Old HIDL HAL returns empty suffix, we should maintain this behavior in
AIDL.
Test: bootctl get-suffix 9, make sure result is empty
Bug: 219966986
Change-Id: Ia01c6bda899f3c5e0cdd1007cb051f7558f2e911
There's already a libboot_control, which provides implementation for
bootcontrol HAL. Implement AIDL bootctrl server by wrapping
libboot_control
Test: th
Bug: 227536004
Change-Id: Ia54f91f7fd17b6e86956e458cdf0c36c31624dbc