Add IOmxStore and remove IOmxNode::setQuirks.

IOmxStore is used for passing results from parsing media_codecs.xml and
related XML files to the framework. Once XML parsing is moved to the HAL
side, IOmxNode::setQuirks will not be needed anymore.

Test: Media post-submit tests on Pixel phone.
Test: Manual use of Camera, Photos, Play Movies and YouTube apps.
Bug: 36952714
Change-Id: I6b24c486c6f8afcbef6ee88a13b2b5bb08d3e656