Add equal overloads to some MediaDescription and MediaQueue objects (2/3)

Bug: 64686424
Test: Connect to carkit and see that NowPlayingChanged only gets sent when
      the queue changes, run cts test
Change-Id: I58c9dd0bf976485a2efefd042cd667ee433e07e1
(cherry picked from commit 6edb68bea68d5f324384f3e9e411118eb8dfc781)
2 files changed