Revert "changes for pa tree"

This reverts commit cd0e54dca3a4312839ae183e6dd2361fad6959af.
Revert "aospa tree"

This reverts commit 92dd913b35ad75772cb4a46470a200780f7283ba.
Revert "change on pa.dependencies"

This reverts commit 8449da1ee54689ee7068263ee0c0b87e15010d75.
Revert "Optimization for build"

This reverts commit 38dcf1b77d1aef7e8e91046710ecc64730a54744.
Revert "modification for AOSPA-Legacy"

This reverts commit 721b235386343e4dbff17966a42f695f9b390579.