Bluetooth: Add trust device feature.

Add set trust feature where the remote device is marked
as a trusted device for subsequent connection.

CRs-fixed: 523135

Change-Id: I9bde4d7dfe07d9d63b58a661ed2413f45501bd7b
(cherry picked from commit 7ba8616bb2ba13558cdf0f00d7e1ae5b38a6ba53)
(cherry picked from commit 9bda1cf301ea06b0873d28fe1b0fcadaf2b1fb73)
(cherry picked from commit 50f4f58ae97f433b68e79a14cb662a7db9b410c9)