Android: Remove ABS

Finally got rid of the 3rd party actionbar library and went full native!  Had to keep support libs for the Pager class since it, annoyingly, doesn't actually exist in the core libs.

Also fixed some unrelated bugs as noted in the commits that were found while debugging compatibility issues.

Note: the replacement compat libs are quite big, so I enabled proguard jar trimming for command line builds.  Please be sure that your build environment also runs proguard using the supplied config file.  If all is correctly configured, the new APK should be around half a megabyte.