Remove browsing requirement from MediaPlayerWrapper for queue support

An incorrect asumption was made that browsing was required in order to
have a now playing list. For AVRCP this is true, but in the Media
Framework a player can support browsing but have no queue and vice
versa.

Bug: 68854188
Test: runtest bluetooth -c com.android.bluetooth.avrcp.MediaPlayerWrapperTest
Change-Id: Ic4fa856e2576712f196316efe1b66f85fa1570bf