HFPC: Avoid sending ok callback of BIEV to app layer

When sending ok callback to app layer, it pops out an action ququed
there, but BIEV commands are not queued so it may confuse the order of
queue. Since we don't want to do anything to BIEV commands, we can just
ignore them in the stack.

Tag: #stability
Bug: 223915098
Test: atest BluetoothInstrumentationTests
Change-Id: Ic3b3b59019e3c170492bf9badc1fb3830936e7b1