bump tools

* gradle 2.14.1
* gradle plugin 2.2.0
* build tools 24.0.2
* support library 24.2.+
* target sdk 24

Change-Id: Ie327d2ea305ad31fd2771577bbd325d1a3ca4a72
diff --git a/ring-android/app/build.gradle b/ring-android/app/build.gradle
index 9408560..c5bce5e 100644
--- a/ring-android/app/build.gradle
+++ b/ring-android/app/build.gradle
@@ -9,11 +9,11 @@
     compile fileTree(include: '*.jar', dir: 'libs')
     compile 'com.j256.ormlite:ormlite-core:4.48'
     compile 'com.j256.ormlite:ormlite-android:4.48'
-    compile 'com.android.support:support-v13:23.2.+'
-    compile 'com.android.support:design:23.2.+'
-    compile 'com.android.support:cardview-v7:23.2.+'
-    compile 'com.android.support:preference-v14:23.2.+'
-    compile 'com.android.support:recyclerview-v7:23.2.+'
+    compile 'com.android.support:support-v13:24.2.+'
+    compile 'com.android.support:design:24.2.+'
+    compile 'com.android.support:cardview-v7:24.2.+'
+    compile 'com.android.support:preference-v14:24.2.+'
+    compile 'com.android.support:recyclerview-v7:24.2.+'
     compile 'com.jayway.android.robotium:robotium-solo:5.4.1'
     compile 'com.astuetz:pagerslidingtabstrip:1.0.1'
     compile 'com.googlecode.libphonenumber:libphonenumber:7.0.11'
@@ -26,8 +26,8 @@
 }
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.2"
+    compileSdkVersion 24
+    buildToolsVersion "24.0.2"
     sourceSets {
         main {
             aidl.srcDirs = ['src/main/java']