Cleanup dedicated_device_control_api_enabled

Flag was rolled out in Android V. Flag is exportes, so keeping the
definition.

Bug: 335663055
Test: TH
Relnote: N/A
Flag: EXEMPT flag cleanup
LOW_COVERAGE_REASON=NON_CODE_ONLY

Change-Id: I150b6c46ddbc6d97065114f218a13baf29140c7b
1 file changed