Use simple equality to compare media notif intents

Intent.filterEquals does not compare extra data included in intents,
which can lead to false positives for some apps, resulting in stale
intents being used

Flag: com.android.systemui.media_controls_posts_optimization
Bug: 369853463
Test: manual with affected apps
Test: MediaDataProcessorTest
Change-Id: Ib037ece86cdd887ab0bb56b54648db7b73b42fab