Make setComponentAvailable() synchronous

By default, it appears that the
PackageManager#SetComponentEnabledSetting() function used to allow
profiles to enable and disable their owned dependencies is actually
asynchronous. This means that there is currently a race between the
system flushing these changes so they take effect and Bluetooth (or
other components) wanting to use the dependency.

This change adds the PackageManager.SYNCHRONOUS flag to make the calls
to SetComponentAvailable always be in effect after the call completes.

Tag: #stability
Bug: 229629444
Test: atest BluetoothInstrumentationTest
Merged-In: I689d314e3afba884a7949e6f0c39157a668bbf92
Change-Id: I689d314e3afba884a7949e6f0c39157a668bbf92