AAPT2: Create Makefile

Makefile that uses zip for assembling the final APK. This is temporary and
helps speed up the rest of development.

Has to add a new 'manifest' phase that simply compiles the AndroidManifest.xml.
Manifests are handled differently and must be validated.

Change-Id: I0d8255b3ad0d0b0a322683077e3331ca93e37fa0