Revert "Revert "build change""

This reverts commit 1f3a0f2474ee297d826f11bf7052439bc5c75e2d.
Revert "Revert "modification for AOSPA-Legacy""

This reverts commit 37086936dbe398760bd277df6236918810ae6362.
Revert "Revert "Optimization for build""

This reverts commit a154be333e039d721393b7b5a0f239366e60cf86.
Revert "Revert "change on pa.dependencies""

This reverts commit 183c3113e63a39a2e1032ccd870427321f970d75.
Revert "Revert "aospa tree""

This reverts commit c4507bea89313387b92b831783456270755431f6.
Revert "Revert "changes for pa tree""

This reverts commit 250a807ad8d1b07234e40782308f14c493a2f646.