Grant HDMI_CEC permission to Shell

Needed for HDMI_CEC CTS tests to call HdmiControlManager.

Bug: 169914520
Test: atest CtsHdmiCecHostTestCases with changes to tests
Change-Id: Ia997f3910ab4ca3a149b2cbd3b1d3d7e9f7202f2
Merged-In: Ia997f3910ab4ca3a149b2cbd3b1d3d7e9f7202f2
2 files changed