Add Android Studio project for AppRTCMobile that builds against AAR.

This project can be used for testing the AAR before publishing. Removes
dependency to Chromium from the tests to support Android Studio.

Bug: webrtc:8365
Change-Id: I7568a3f636fd7d478d274b4766f33ab00f28a6f0
Reviewed-on: https://webrtc-review.googlesource.com/7608
Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
Commit-Queue: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20269}
diff --git a/examples/aarproject/build.gradle b/examples/aarproject/build.gradle
new file mode 100644
index 0000000..5a016ef
--- /dev/null
+++ b/examples/aarproject/build.gradle
@@ -0,0 +1,27 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+buildscript {
+
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.0.0-beta2'
+
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}