media.c2 aidl: provide a waitable fd for blockpool creation

Provide a waitable fd as a param for IComponent::createBlockPool()
along with IGraphicBufferAllocator interface. This will remove one IPC
call from HAL to client to get a waitable fd during blockpool creation.

Test: m
Bug: 254050314
Change-Id: I38d9bde987793e352299385fb141e484c758f89d
2 files changed