[Android] Android Auto usability enhancements and bug fixes.

[Robert Stone]

vlc-android | branch: 3.3.x | Robert Stone <rhstone at gmail.com> | Tue Oct 27 20:50:56 2020 -0700| [a63b65ca9feb4cec5d9af0480ee8094d624795f0] | committer: Nicolas Pomepuy

Android Auto usability enhancements and bug fixes.

(cherry picked from commit dd39e954f23c6c57290735d60a6a185f80631e0d)

> https://code.videolan.org/videolan/vlc-android/commit/a63b65ca9feb4cec5d9af0480ee8094d624795f0
---

 .../main/java/org/videolan/resources/Constants.kt  |   5 +
 .../resources/src/main/res/values/strings.xml      |   2 +
 .../src/org/videolan/vlc/MediaSessionCallback.kt   |  27 ++
 .../src/org/videolan/vlc/PlaybackService.kt        |  21 +-
 .../org/videolan/vlc/media/MediaSessionBrowser.kt  | 366 +++++++++++++++++----
 5 files changed, 350 insertions(+), 71 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/a63b65ca9feb4cec5d9af0480ee8094d624795f0