[automerger skipped] Add LOCAL_APKCERTS_FILE support. am: 8f9d08a1 am: 081755c5 -s ours am: 38b4b2f0 -s ours am: 0a2ced9a -s ours am: 504f6688 -s ours am: 49842cd6 -s ours

am skip reason: Change-Id I48183bc8cbf9dcc521f791812734205ed3f28f4c with SHA-1 29714ecd is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/+/12277066

Change-Id: I46295fa2d7f6cce2faf3b0af7306a2a4acb2af5f