Rename rtc_instrumentation_test_apk targets to end with _test_apk.

This matches Chromium pattern of naming instrumentation test apks with
a name ending in _test_apk. The old naming confuses generate_gradle.py.

Renames:
 - AppRTCMobileTest
   -> AppRTCMobile_test_apk
 - AppRTCMobileTestStubbedVideoIO
   -> AppRTCMobile_stubbed_video_io_test_apk
 - libjingle_peerconnection_android_unittest
   -> android_instrumentation_test_apk

Bug: webrtc:9588
TBR: phoglund
Change-Id: Idb82dc4bd089bc7c90e9373f7c3d572f9fd2d95a
Reviewed-on: https://webrtc-review.googlesource.com/92380
Commit-Queue: Sami Kalliomäki <sakal@webrtc.org>
Reviewed-by: Oleh Prypin <oprypin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24184}
diff --git a/tools_webrtc/mb/gn_isolate_map.pyl b/tools_webrtc/mb/gn_isolate_map.pyl
index 848a9b3..57ede1a 100644
--- a/tools_webrtc/mb/gn_isolate_map.pyl
+++ b/tools_webrtc/mb/gn_isolate_map.pyl
@@ -19,12 +19,12 @@
     "label": "//:All",
     "type": "additional_compile_target",
   },
-  "AppRTCMobileTest": {
-    "label": "//examples:AppRTCMobileTest",
+  "AppRTCMobile_test_apk": {
+    "label": "//examples:AppRTCMobile_test_apk",
     "type": "additional_compile_target",
   },
-  "AppRTCMobileTestStubbedVideoIO": {
-    "label": "//examples:AppRTCMobileTestStubbedVideoIO",
+  "AppRTCMobile_stubbed_video_io_test_apk": {
+    "label": "//examples:AppRTCMobile_stubbed_video_io_test_apk",
     "type": "additional_compile_target",
   },
   "android_junit_tests": {
@@ -55,8 +55,8 @@
       "isac_speech_and_misc_wb.pcm",
     ]
   },
-  "libjingle_peerconnection_android_unittest": {
-    "label": "//sdk/android:libjingle_peerconnection_android_unittest",
+  "android_instrumentation_test_apk": {
+    "label": "//sdk/android:android_instrumentation_test_apk",
     "type": "additional_compile_target",
   },
   "low_bandwidth_audio_test": {