Merge "Replace TARGET_BOOTLOADER_BOARD_NAME with the value." am: 6278af282e am: d1a7cd07f2 am: 86eb5632d7

Original change: https://android-review.googlesource.com/c/device/google/bramble/+/1931378

Change-Id: I5c71804ca68f30ceb5f37908084658416bbbb161