Add bounds checks in btif_avrcp_audio_track.cc

Fuzz testing reveals that the transcodeQ*ToFloat family of functions are
not bounds checked, causing a potential OOB write.

Check these functions against bounds of the destination array.

Bug: 275895309
Test: atest bluetooth_test_gd_unit, net_test_stack_btm
Tag: #security
Ignore-AOSP-First: Security
Merged-In: I7a13261429797769cf5b913912a30e249668ac93
Change-Id: I7a13261429797769cf5b913912a30e249668ac93