Remove getUserId mock method from Mock Context.

getUserId is a widely used context method and mocking it with an exception can cause many failures if not overridden with a valid value.

Removed the getUserId() method from mock context to use actual invocation, Text classes can still override the method in the Test class implementation if it's needed for any specific case.

Test: atest EabControllerTest -c
Test: atest TelephonyProviderTest -c

Bug: 319931444
Bug: 319437162
Bug: 320426061

Change-Id: Ibf9a2efc22a3bdbc8403dfbc25be07485f4336b4

test-mock/src/android/test/mock/MockContext.java

@@ -822,12 +822,6 @@ public class MockContext extends Context {
         throw new UnsupportedOperationException();
     }
 
-    /** {@hide} */
-    @Override
-    public int getUserId() {
-        throw new UnsupportedOperationException();
-    }
-
     @Override
     public Context createConfigurationContext(Configuration overrideConfiguration) {
         throw new UnsupportedOperationException();