[automerger skipped] Rename BufferRole.frequency -> probability -- HAL. am: 3633d07092 am: 876c290465 am: cc57258fee -s ours

am skip reason: skip tag Change-Id Ic86f73b8be2aed567ae4ca17bdb3a57c658fb349 with SHA-1 46bf892f46 is already in history

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1663160

Change-Id: Icbab5e2c17c01ad7fa27838aa6d75e3bda0854d1