[Android] Disable screen lock when a title is running.

Encountered this when testing out the Wii U Gamecube Adapter.

Source/Android/app/src/main/res/layout-television/activity_emulation.xml

@@ -1,6 +1,7 @@
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
+             android:keepScreenOn="true"
              xmlns:tools="http://schemas.android.com/tools"
              android:id="@+id/frame_content">
 

Source/Android/app/src/main/res/layout/fragment_emulation.xml

@@ -2,6 +2,7 @@
              xmlns:tools="http://schemas.android.com/tools"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
+             android:keepScreenOn="true"
              tools:context="org.dolphinemu.dolphinemu.fragments.EmulationFragment">
 
     <!-- This is what everything is rendered to during emulation -->