MediaPlayer: Handle LeAudio play same as in AVRCP

When player is not available, which usually happens after phone restart,
use passthrogh command to send play to media session

Bug: 326528836
Bug: 337169240
Test: mmm packages/modules/Bluetooth
Test: manual use play on LE Headset just after phone restart
Change-Id: I58719fd4684e45cba4af96ef0727550f7094a391