Use androidx.test instead of android.support.test

This CL mechanically changes package name of AndroidJUnitRunner, test
annotation classes, test filter classes, and etc. from android.support.test
to androidx.test.

This CL also copies WidgetTestUtils#runOnMainAndDrawSync() helper method
from CTS and eliminates compatibility-device-util from dependency.

Bug: None
Exempt-From-Owner-Approval: Large-scale refactor
Test: Run all non-flaky presubmit tests in FrameworksCoreTests
  $ tradefed.sh run commandAndExit FrameworksCoreTests \
        --include-annotation android.platform.test.annotations.Presubmit \
	--exclude-annotation androidx.test.filters.FlakyTest
  430 tests pass.
Change-Id: Ia65c4f643961afaa01c2c8d4b271712e574eb45c
diff --git a/core/tests/coretests/src/android/graphics/ColorStateListTest.java b/core/tests/coretests/src/android/graphics/ColorStateListTest.java
index 374d142..1d34f93 100644
--- a/core/tests/coretests/src/android/graphics/ColorStateListTest.java
+++ b/core/tests/coretests/src/android/graphics/ColorStateListTest.java
@@ -19,7 +19,8 @@
 import android.content.res.ColorStateList;
 import android.content.res.Resources;
 import android.test.AndroidTestCase;
-import android.test.suitebuilder.annotation.SmallTest;
+
+import androidx.test.filters.SmallTest;
 
 import com.android.frameworks.coretests.R;