我的Android应用程序显示两个图标，但没有两个启动器

Question

我的android应用程序显示两个图标，但是没有两个启动器。

我已经在多个地方搜索过，但是每个人都说该应用程序有两个启动器，但我的应用程序没有。我已经尝试了所有可能性。

给我的印象是，在添加了Firebase的TAG之后，该问题开始发生。我已经检查了所有活动，它们都是正确的。

我的AndroidManifest是：

(...)

<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.READ_PROFILE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />

<uses-feature
    android:name="android.hardware.camera.any"
    android:required="true" />
<uses-feature
    android:name="android.hardware.camera.autofocus"
    android:required="false" />

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <meta-data
        android:name="com.facebook.sdk.ApplicationId"
        android:value="@string/facebook_app_id" />

    <activity
        android:name=".SplashActivity"
        android:configChanges="orientation|keyboardHidden|screenSize"
        android:label="@string/app_name"
        android:theme="@style/FullscreenTheme">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".LoginActivity"
        android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar"
        android:windowSoftInputMode="stateHidden|stateAlwaysHidden" />
    <activity
        android:name=".WorkshopActivity"
        android:label="@string/title_activity_workshop"
        android:parentActivityName=".MainActivity" />
    <activity
        android:name=".MainActivity"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar" />
    <activity
        android:name=".CompanyActivity"
        android:parentActivityName=".MainActivity"
        android:screenOrientation="portrait" />
    <activity
        android:name=".BicycleActivity"
        android:parentActivityName=".MainActivity"
        android:screenOrientation="portrait" />
    <activity
        android:name=".BicycleDetailActivity"
        android:parentActivityName=".BicycleActivity"
        android:screenOrientation="portrait" />
    <activity
        android:name=".BicycleWorkshopActivity"
        android:parentActivityName=".BicycleActivity"
        android:screenOrientation="portrait" />
    <activity
        android:name=".WorkshopDetailActivity"
        android:parentActivityName=".WorkshopActivity"
        android:screenOrientation="portrait" />
    <activity
        android:name=".CommentActivity"
        android:parentActivityName=".WorkshopDetailActivity"
        android:screenOrientation="portrait"
        android:windowSoftInputMode="stateHidden" />
    <activity
        android:name=".NewBicycleActivity"
        android:windowSoftInputMode="stateHidden" />
    <activity
        android:name=".EditProfileActivity"
        android:windowSoftInputMode="stateHidden" />

    <activity
        android:name=".GoogleSignInActivity"
        android:theme="@style/AppTheme.NoActionBar"
        android:windowSoftInputMode="stateHidden" />
    <activity
        android:name=".FacebookLoginActivity"
        android:theme="@style/AppTheme.NoActionBar"
        android:windowSoftInputMode="stateHidden" />
    <activity android:name=".SettingsActivity" />
    <activity android:name=".NotificationActivity" />

    <activity
        android:name=".NewUserActivity"
        android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
        android:label="@string/text_new_user"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar" />

    <meta-data
        android:name="com.facebook.sdk.ApplicationId"
        android:value="@string/facebook_app_id" />

    <activity
        android:name="com.facebook.FacebookActivity"
        android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
        android:label="@string/app_name" />
    <activity
        android:name="com.facebook.CustomTabActivity"
        android:exported="true">
        <intent-filter>
            <action android:name="android.intent.action.VIEW" />
            <category android:name="android.intent.category.DEFAULT" />
            <category android:name="android.intent.category.BROWSABLE" />
            <data android:scheme="@string/fb_login_protocol_scheme" />
        </intent-filter>
    </activity>

    <service android:name=".support.FirebaseService">
        <intent-filter>
            <action android:name="com.google.firebase.MESSAGING_EVENT" />
        </intent-filter>
    </service>

    <meta-data
        android:name="com.google.firebase.messaging.default_notification_icon"
        android:resource="@drawable/ic_blump" />
    <meta-data
        android:name="com.google.firebase.messaging.default_notification_channel_id"
        android:value="@string/push_channel_id" />

    <meta-data
        android:name="firebase_messaging_auto_init_enabled"
        android:value="false" />

    <provider
        android:name="android.support.v4.content.FileProvider"
        android:authorities="${applicationId}"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/file_path" />
    </provider>
  (...)