[Android] Update OWNERS information (androidoverlay)

https://docs.google.com/document/d/1q7MxrwLlI7EOeKDap3ubrGjGUlKAcHq7pWn9G6pRXE4/

Bug: 1112872
Change-Id: I80c79343dd32b9fe38967c476584e92a228d4e50
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2339797Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Commit-Queue: Yaron Friedman <yfriedman@chromium.org>
Auto-Submit: Fred Mello <fredmello@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796370}

content/public/android/java/src/org/chromium/content/browser/androidoverlay/OWNERS

+file://content/browser/media/OWNERS
+
+# OS: Android