AVRCP CT: Add getPlayStatus API

- Required for PTS test case TC_CT_MDI_BV_01_C

Bug: b/31684931
Change-Id: Ieef8b408657931505f02b9ea408d9658ecb4a3e3
(cherry picked from commit 6eeb548cd2d00695c3492496b32780cda9e34795)
4 files changed