Revert "Default to AAPT2 = false in AOSP only"

I276d22e82dbef65eaa0f6c3331d7990292a62bc9 fixes the underlying
issue that was causing Launcher to crash when building with aapt2.

This reverts commit 0838a7d4.

Bug: 80404630
Test: booted and launcher didn't crash
Change-Id: I77e231b000e7c05a631bc44271c203dd698b6873
Merged-In: I2edc3c9ba8e3e7616ea39c4ebf1fe6e65f113090