Kill the goldfish emulator crap with fire.

This reverts the following commits that break building on older
devices:

Revert "Android Emulator [ARM]"

This reverts commit fcb6bfc501db9538ffec90e8729e274e09717699.

Revert "add camera.goldfish.jpeg to emulator targets and mini targets"

This reverts commit d9b0e80c1d2a70dae1ce7905ff4bfd554029bb88.

Revert "pull goldfish specific stuffs from emulator.mk"

This reverts commit c3eb68c4ba383e7de2dd9b761d96dbe646586845.