DO NOT MERGE Bump AOSP Contacts version to 1.5.15

Bug 28880104

Change-Id: Idf0ed29ecd0c6fb4057335e8783d58c4b1181a8c
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index e546ba8..9995ef1 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -16,8 +16,8 @@
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.android.contacts"
-    android:versionCode="10514"
-    android:versionName="1.5.14">
+    android:versionCode="10515"
+    android:versionName="1.5.15">
 
     <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="25" />