Rename isConnectable()

LocalBluetoothProfile.isConnectable() checks whether the user can initiate a connection
for a specific profile, not really whether the profile is connectable.

Change-Id: If6c6cd1554acf35db2460ea6ddb65148a7e86e45
Bug: 79982487
Test: atest tests/robotests/src/com/android/settings/bluetooth/BluetoothDetailsProfilesControllerTest.java