Add haptic metadata for Ogg file.

Add a key "haptic" in Ogg file metadata, which indicating the haptic
channel count of the Ogg file. When it is present as a valid number,
OggExtractor will set haptic channel mask accordingly to support haptic
playback via audio. This is part of haptic playback support.

Bug: 111454766
Test: Manually test
Change-Id: I9f9ba22358b7c538382f23f24143057970f6d7ad