Revert "Removed BluetoothDevice#prepareToEnterProcess"

This reverts commit e8f2077feec8c548dbc2c6d08016b76edcc56eb8.

Reason for revert: Introducing regression for gms core

Test: None
Change-Id: I644b10c1869c12e1622300de43bfbdb57fb583d8
3 files changed