Migrate Telecom tests to JUnit4

Change all tests to use AndroidJUnitRunner instead of
InstrumentationRunner.
TelecomTestCase no longer inherits from AndroidTestCase.
Update the lite_test_telecom script to use JUnit4.

This allows Telecom tests to use modern JUnit4 features. Refactorings
along those lines will be in subsequent CLs.

Bug: 69482930
Test: lite_test_telecom -a
Change-Id: I64a41fa049f2a23f28b7652d7b835d7705e2179a
diff --git a/scripts/telecom_testing.sh b/scripts/telecom_testing.sh
index 723b041..779f449 100644
--- a/scripts/telecom_testing.sh
+++ b/scripts/telecom_testing.sh
@@ -58,7 +58,7 @@
       build_dir="packages/services/Telecomm/tests"
       apk_loc="data/app/TelecomUnitTests/TelecomUnitTests.apk"
       package_prefix="com.android.server.telecom.tests"
-      instrumentation="android.test.InstrumentationTestRunner";;
+      instrumentation="android.support.test.runner.AndroidJUnitRunner";;
     "telephony")
       build_dir="frameworks/opt/telephony/tests/"
       apk_loc="data/app/FrameworksTelephonyTests/FrameworksTelephonyTests.apk"