Trigger cronet trybots for Android build rule changes.

These types of changes often break cronet, so the bots should run!

Bug: 966720
Change-Id: I6714fe8aff9e1d77bc76582eb0fa19f931729a9b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1627564
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#663163}

docs/infra/cq_builders.md

@@ -87,6 +87,8 @@ builder.
   Path regular expressions:
     * [`//components/cronet/.+`](https://cs.chromium.org/chromium/src/components/cronet/)
     * [`//components/grpc_support/.+`](https://cs.chromium.org/chromium/src/components/grpc_support/)
+    * [`//build/android/.+`](https://cs.chromium.org/chromium/src/build/android/)
+    * [`//build/config/android/.+`](https://cs.chromium.org/chromium/src/build/config/android/)
 
 * [android_compile_x64_dbg](https://ci.chromium.org/p/chromium/builders/luci.chromium.try/android_compile_x64_dbg) ([`commit-queue.cfg` entry](https://cs.chromium.org/search/?q=package:%5Echromium$+file:commit-queue.cfg+chromium/try/android_compile_x64_dbg)) ([matching builders](https://cs.chromium.org/search/?q=file:trybots.py+android_compile_x64_dbg))
 

infra/config/commit-queue.cfg

@@ -155,6 +155,8 @@ config_groups {
         name: "chromium/try/android-cronet-arm-dbg"
         location_regexp: ".+/[+]/components/cronet/.+"
         location_regexp: ".+/[+]/components/grpc_support/.+"
+        location_regexp: ".+/[+]/build/android/.+"
+        location_regexp: ".+/[+]/build/config/android/.+"
         location_regexp_exclude: ".+/[+]/components/cronet/ios/.+"
       }
       builders {