Merge "Remove BOARD_BPT* variables and the bpt parition table image" into main...

Merge "Remove BOARD_BPT* variables and the bpt parition table image" into main am: f5350e96 am: 735fe497 am: 9aa95a1f

Original change: https://android-review.googlesource.com/c/platform/build/+/2654584



Change-Id: Idf53f15a27c874b1a3f628a6213da5f37a15ebbe
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>