Reorganizing into library project
android: adapted build for library project

- use manifestmerger.enabled to merge library manifest
- updated intent/activities to be implicit
Merge remote-tracking branch 'upstream/master' into androidlib
Various fixes and reorganisation of files for Android library project
New optimized NEON yCbCr to RGB conversion
Android: renaming of JNI API
Merge remote-tracking branch 'upstream/master' into androidlib
Android: Fixed certificate caching
Merged with freerdp/master
Android: Fixed settings sub-screen handling, cleaned up strings.xml
Android: Added test bookmark
Android: Fixed test bookmark
Merge remote-tracking branch 'upstream/master' into androidlib
Merge pull request #1001 from mfleisz/androidlib

Android: Refactored Android app into a library project and a small launcher app