Correctly showing the debug label on the launcher. Updated gradle plugin.

app/build.gradle

@@ -79,6 +79,7 @@ android {
             applicationIdSuffix '.debug'
             versionNameSuffix ' DEBUG'
             manifestPlaceholders = [appName: "Phonograph DEBUG"]
+
             signingConfig signingConfigs.debug
         }
     }

app/src/main/AndroidManifest.xml

@@ -16,13 +16,11 @@
         android:name=".App"
         android:allowBackup="true"
         android:icon="@drawable/ic_launcher"
-        android:label="@string/app_name"
+        android:label="${appName}"
         android:supportsRtl="true"
         android:theme="@style/Theme.Phonograph.Light"
         tools:ignore="UnusedAttribute">
-        <activity
-            android:name=".ui.activities.MainActivity"
-            android:label="@string/app_name">
+        <activity android:name=".ui.activities.MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <action android:name="android.intent.action.MUSIC_PLAYER" />