Add more OWNERs to content/public/android

BUG=None
NOTRY=true

Review URL: https://codereview.chromium.org/897803002

Cr-Commit-Position: refs/heads/master@{#314598}

content/public/android/OWNERS

 benm@chromium.org
+dtrainor@chromium.org
 tedchoc@chromium.org
 yfriedman@chromium.org
 

content/public/android/java/res/OWNERS

+set noparent
+tedchoc@chromium.org
+aurimas@chromium.org
+newt@chromium.org
+dtrainor@chromium.org
+yusufo@chromium.org
+dfalcantara@chromium.org