Merge cherrypicks of ['googleplex-android-review.googlesource.com/27813145'] into 24D1-release.

Change-Id: I2f31195dbb43db4cdc5f253dcb131bb25606b3f1
tree: c58f572fdac2a2df0ded4228c516265471193c4c
  1. system_ext/
  2. tracking_denials/
  3. vendor/
  4. comet-sepolicy.mk
  5. OWNERS