ACodec: read max pts gap and max fps keys for image encoders

These keys are needed to disable backward frame drops for image
encoders. They should be read for both video and image types.

bug: 141169323
Change-Id: I12bea9b25a9902a50ba0e7f7d3f8aa5a497c581c
(cherry picked from commit 226cedd0ccd3c17c917c951952e278eacd26d7c8)
1 file changed