Migrate packages/services/Telephony to androidx.test

See go/jetpack-test-android-migration

Test: compile
Merged-In: Icff5cdcee2284515071e8694bae7db82749071fd
Change-Id: I8363ce6051e95a441383a5c0bd926771eb5c4da6
diff --git a/tests/src/com/android/TelephonyTestBase.java b/tests/src/com/android/TelephonyTestBase.java
index 7b7bef2..d30ae6b 100644
--- a/tests/src/com/android/TelephonyTestBase.java
+++ b/tests/src/com/android/TelephonyTestBase.java
@@ -19,9 +19,10 @@
 import android.content.Context;
 import android.os.Handler;
 import android.os.Looper;
-import android.support.test.InstrumentationRegistry;
 import android.util.Log;
 
+import androidx.test.InstrumentationRegistry;
+
 import org.mockito.MockitoAnnotations;
 
 import java.util.concurrent.CountDownLatch;