Add FSTAB_OWNERS and update OWNERS to include Android.bp am: 0da2a72457

Original change: https://android-review.googlesource.com/c/device/google/gs101/+/3212451

Change-Id: I555f5fdd633108e2a4dfeea58faf2fb03dea3aff
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>