Add megjablon back to DRP OWNERS

Change-Id: Ieda66129f16756e97cd72fae57aa618377e59e44
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1831454Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Reviewed-by: Megan Jablonski <megjablon@chromium.org>
Commit-Queue: Robert Ogden <robertogden@chromium.org>
Cr-Commit-Position: refs/heads/master@{#701281}

components/data_reduction_proxy/OWNERS

@@ -2,6 +2,7 @@
 tbansal@chromium.org
 dougarnett@chromium.org
 mcrouse@chromium.org
+megjablon@chromium.org
 rajendrant@chromium.org
 robertogden@chromium.org
 ryansturm@chromium.org