v0.7.4b: restructured initialization logic into new android module

A lot of cleanup is needed for this, but everything works

core/src/debug/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@mipmap/ic_launcher_background"/>
-    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
-</adaptive-icon>

core/src/main/AndroidManifest.xml

@@ -1,38 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-	package="com.shatteredpixel.shatteredpixeldungeon"
-	android:installLocation="auto">
-	
-	<uses-feature
-		android:glEsVersion="0x00020000"/>
+    package="com.shatteredpixel.shatteredpixeldungeon">
 
-	<!-- Note that the game doesn't truly support small screen resolutions,
-		it instead forces downscaling to work on these displays.-->
-	<supports-screens
-		android:smallScreens="true"
-		android:normalScreens="true"
-		android:largeScreens="true"
-		android:xlargeScreens="true"/>
-
-	<application
-		android:icon="@mipmap/ic_launcher"
-		android:label="${appName}"
-		android:theme="@android:style/Theme.Black.NoTitleBar"
-		android:resizeableActivity="true"
-		android:allowBackup="true"
-		android:fullBackupOnly="true"
-		android:backupAgent="com.shatteredpixel.shatteredpixeldungeon.BackupHandler">
-		<activity
-			android:label="${appName}"
-			android:name="com.shatteredpixel.shatteredpixeldungeon.ShatteredPixelDungeon"
-			android:screenOrientation="nosensor"
-			android:configChanges="keyboard|keyboardHidden|orientation">
-			<intent-filter >
-				<action android:name="android.intent.action.MAIN" />
-				<category android:name="android.intent.category.LAUNCHER" />
-			</intent-filter>
-		</activity>
-
-	</application>
+    <uses-feature android:glEsVersion="0x00020000"/>
 
 </manifest>