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

data/etc/privapp-permissions-platform.xml

@@ -452,6 +452,8 @@ applications that come with the platform
         <permission name="android.permission.TEST_BIOMETRIC" />
         <!-- Permissions required for CTS test - CtsContactsProviderTestCases -->
         <permission name="android.contacts.permission.MANAGE_SIM_ACCOUNTS" />
+        <!-- Permissions required for CTS test - CtsHdmiCecHostTestCases -->
+        <permission name="android.permission.HDMI_CEC"/>
     </privapp-permissions>
 
     <privapp-permissions package="com.android.statementservice">

packages/Shell/AndroidManifest.xml

@@ -368,6 +368,9 @@
     <!-- Permission required for CTS test - HideOverlayWindowsTest -->
     <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
 
+    <!-- Permission required for CTS test - CtsHdmiCecHostTestCases -->
+    <uses-permission android:name="android.permission.HDMI_CEC" />
+
     <application android:label="@string/app_label"
                 android:theme="@android:style/Theme.DeviceDefault.DayNight"
                 android:defaultToDeviceProtectedStorage="true"