Adding smaier@ to tools/android/roll/android_deps/OWNERS

Change-Id: I1aea40512deb6d258332b998f2c89cec11f779ed
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1768937
Auto-Submit: Sam Maier <smaier@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#690253}

tools/android/roll/android_deps/OWNERS

 agrieve@chromium.org
 jbudorick@chromium.org
+smaier@chromium.org
 wnwen@chromium.org