Bump targetSdkVersion to 24

This will only affect AOSP build.

BUG:28621267
Change-Id: I814ee202d3bfe55cce93bc67e30ffa8bb450db9a
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 3bd8973..43a2b3f 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -7,7 +7,7 @@
 
     <original-package android:name="com.android.gallery3d" />
 
-    <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="17" />
+    <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="24" />
 
     <permission android:name="com.android.gallery3d.permission.GALLERY_PROVIDER"
             android:protectionLevel="signatureOrSystem" />