Add aliceywang@ as owner of components/signin java files

Change-Id: I26f79c147be2dcde083ac4f5be88267ccd2e236a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2359135Reviewed-by: Boris Sazonov <bsazonov@chromium.org>
Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Commit-Queue: Alice Wang <aliceywang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#798640}

components/signin/OWNERS

@@ -4,5 +4,8 @@ msalama@chromium.org
 msarda@chromium.org
 sdefresne@chromium.org
 
+# For android related change
+per-file *android*=aliceywang@chromium.org
+
 # TEAM: chrome-signin@chromium.org
 # COMPONENT: Services>SignIn