Merge "Make ShellTestCase try to delete TestableLooper" into main

import android.platform.test.flag.junit.DeviceFlagsValueProvider;

import android.platform.test.flag.junit.SetFlagsRule;

import android.testing.TestableContext;

import android.testing.TestableLooper;

import androidx.test.platform.app.InstrumentationRegistry;

    @After

    public void shellTearDown() {

        // In case someone set up a TestableLooper during the test, get rid of it because

        // TestableLooper intrinsically leaks all past test method member fields in a

        // big static list.

        //

        // TODO (b/261039202): don't use TestableLooper in WmShell tests at all.

        if (TestableLooper.get(this) != null) {

            TestableLooper.get(this).processAllMessages();

            TestableLooper.remove(this);

        }

        InstrumentationRegistry

                .getInstrumentation()

                .getUiAutomation()