Update the AndroidManifest

The old AndroidManifest included the splash screen resource that was
removed in commit 4d08d80be60af14c5daed7c6f8d37538aea6c429@qtbase

Task-number: QTBUG-37523

Change-Id: I42dab93e2654f3fc47bb715f7cfdf21169aa8f11
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>