Update minSdkVersion and targetSdkVersion constants.

- Chrome has been targetting 22 for a while now so updating to match it.
- Chrome has deprecated ICS so raising minSdkVersion to 16.

BUG=473837

Review URL: https://codereview.chromium.org/1061713002

Cr-Original-Commit-Position: refs/heads/master@{#323947}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 1d807cd78fe35e59218b1cb9a78a93a13a4b0e10

android/AndroidManifest.xml

@@ -15,6 +15,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="dummy.package">
 
-    <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="21" />
+    <uses-sdk android:minSdkVersion="16" android:targetSdkVersion="22" />
 
 </manifest>