Android: Remove inappropriate leanback checks

Android TV devices aren't the only devices without touchscreens.

Regarding MotionAlertDialog, I could've replaced the leanback
check with a touchscreen check instead of just removing it,
but I thought there was no reason to prevent people with
touchscreens from doing a long back press if they want to.

Source/Android/app/src/main/res/layout-port-notouch/fragment_emulation.xml

@@ -0,0 +1,7 @@
+<SurfaceView xmlns:android="http://schemas.android.com/apk/res/android"
+             android:id="@+id/surface_emulation"
+             android:layout_height="match_parent"
+             android:layout_width="match_parent"
+             android:focusable="false"
+             android:focusableInTouchMode="false"
+    />