Bump gradle to 3.0.1

Change-Id: I1e934fc2a061ef2279d10b40bf8996dedf6525b9
diff --git a/ring-android/build.gradle b/ring-android/build.gradle
index 0eca26a..b3ecb88 100644
--- a/ring-android/build.gradle
+++ b/ring-android/build.gradle
@@ -5,7 +5,7 @@
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.0'
+        classpath 'com.android.tools.build:gradle:3.0.1'
     }
 }
 allprojects {