Enable sdk build flavor for AAOS emulator targets

Host tools and java libraries from these 2 makefiles are required
by sdk flavor

Command "make sdk sdk_repo -j64" creates Android Studio friendly
zip and xml:
1. sdk-repo-linux-system-images-eng.[username].zip
2. repo-sys-img.xml

Edit repo-sys-img.xml:
1. Change tag-id to android-automotive-playstore
2. Don't touch archives section
3. Optional Change reversion/description/tag-display

Then these zip|xml can be ported to android studio

Bug: 160371555
Test: Build target with make sdk sdk_repo -j64
Test: Output should be a system image zip and a xml
Change-Id: Id98ba9eaaa02e179789b79be85a6bc6bedf811ec
1 file changed