Fix unit test failure

Fix failing unit test: HdmiControlServiceBinderAPITest#oneTouchPlay_addressNotAllocated

Test fails as no logical address is allocated, causing a NPE in
HdmiCecLocalDeviceSource#isActiveSource.

Bug: 171956637
Test: atest com.android.server.hdmi
Change-Id: I75f4bb96b2bfae3f85d2c6a3eca8923b88363eb7
1 file changed