Remove AndroidTestCase from UnsupportedAppUsage

I8ea5421723a4a40d580956e5ceb51be70253f0eb has made the two APIs in the
class public (though as deprecated). We don't need to put them into the
greylist, which would make the hiddenapi tool uncomfortable.

Bug: 157007292
Test: m on qemu_trusty_arm64
Change-Id: Ibde3f44244fbe0e2c5da596eef05da57a6ee474a

test-base/hiddenapi/src/android/test/AndroidTestCase.java

-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.test;
-
-import android.compat.annotation.UnsupportedAppUsage;
-import android.content.Context;
-
-import junit.framework.TestCase;
-
-/**
- * @deprecated Stub only
- */
-@SuppressWarnings({ "unchecked", "deprecation", "all" })
-@Deprecated
-public class AndroidTestCase extends TestCase {
-
-    /**
-     * Stub only
-     */
-    @UnsupportedAppUsage
-    public void setTestContext(Context context) {
-        throw new RuntimeException("Stub!");
-    }
-
-    /**
-     * Stub only
-     */
-    @UnsupportedAppUsage
-    public Context getTestContext() {
-        throw new RuntimeException("Stub!");
-    }
-}