Dynamic audio policies: JNI support for UID rules

Rename AttributeMatchCriterion to AudioMixMatchCriterion to be consistent
 with the fact that now mixing rules are not always about audio attributes.

AudioSystem JNI: add support for UID-based rules.

Bug 26798796

Change-Id: Icb0f57841c94f410e1fac9ed071a829a26b9a58e
3 files changed