AImageReader: Add new interfaces

Add the below interfaces
- AImageReader_setDefaultBufferSize()
- AImageReader_setDefaultBufferDataSpace()
- AImageReader_setDefaultAHardwareBufferFormat()
- AImageReader_setMaxImages()

AImageReader does not reject a buffer any more due to the buffer format
being different from that of the reader. AImage now has format and
dataspace of the underlying buffer instead of those of the reader.

Bug: 201479783
Test: presubmit
Flag: EXEMPT ndk
Change-Id: If948f5309cbad8f050b4447730e2c6e41053bcc4