Use relative naming for demo app components

PiperOrigin-RevId: 379506322

demos/cast/src/main/AndroidManifest.xml

@@ -28,7 +28,7 @@
     <meta-data android:name="com.google.android.gms.cast.framework.OPTIONS_PROVIDER_CLASS_NAME"
         android:value="com.google.android.exoplayer2.ext.cast.DefaultCastOptionsProvider"/>
 
-    <activity android:name="com.google.android.exoplayer2.castdemo.MainActivity"
+    <activity android:name=".MainActivity"
         android:configChanges="keyboard|keyboardHidden|orientation|screenSize|screenLayout|smallestScreenSize|uiMode"
         android:launchMode="singleTop" android:label="@string/application_name"
         android:theme="@style/Theme.AppCompat"

demos/main/src/main/AndroidManifest.xml

@@ -38,7 +38,7 @@
       android:name="androidx.multidex.MultiDexApplication"
       tools:targetApi="29">
 
-    <activity android:name="com.google.android.exoplayer2.demo.SampleChooserActivity"
+    <activity android:name=".SampleChooserActivity"
         android:configChanges="keyboardHidden"
         android:label="@string/application_name"
         android:theme="@style/Theme.AppCompat"
@@ -62,7 +62,7 @@
       </intent-filter>
     </activity>
 
-    <activity android:name="com.google.android.exoplayer2.demo.PlayerActivity"
+    <activity android:name=".PlayerActivity"
         android:configChanges="keyboard|keyboardHidden|orientation|screenSize|screenLayout|smallestScreenSize|uiMode"
         android:launchMode="singleTop"
         android:label="@string/application_name"
@@ -83,7 +83,7 @@
       </intent-filter>
     </activity>
 
-    <service android:name="com.google.android.exoplayer2.demo.DemoDownloadService"
+    <service android:name=".DemoDownloadService"
         android:exported="false">
       <intent-filter>
         <action android:name="com.google.android.exoplayer.downloadService.action.RESTART"/>

demos/surface/src/main/AndroidManifest.xml

@@ -15,14 +15,18 @@
 -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.google.android.exoplayer2.surfacedemo">
-  <uses-sdk/>
+
   <uses-permission android:name="android.permission.INTERNET"/>
   <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
+
+  <uses-sdk/>
+
   <application
     android:allowBackup="false"
     android:icon="@mipmap/ic_launcher"
     android:label="@string/application_name"
     android:exported="true">
+
     <activity android:name=".MainActivity">
       <intent-filter>
         <action android:name="android.intent.action.MAIN"/>
@@ -38,5 +42,7 @@
         <data android:scheme="file"/>
       </intent-filter>
     </activity>
+
   </application>
+
 </manifest>