Notify Files App when ARC++ app is installed/removed.
This change will later allow Files App to keep apps shown by
"More actions..." in sync with ARC++.
BUG=620577
TEST=
- git cl try
- ninja -j100 -C out/Release components_unittests &&
out/Release/components_unittests --gtest_filter="ArcIntentHelperTest.*"
- Manually tested using Minnie with this CL
https://codereview.chromium.org/2513493002/:
1. Select a PDF file on Files App.
2. Install Kindle.
3. Confirm "more action..." appears on the context menu and Open
button's UI changes to be able to open Kindle.
4. Uninstall Kindle.
5. Confirm "more action..." no longer appears and Open button doesn't
show Kindle up anymore.
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation
Review-Url: https://codereview.chromium.org/2487623002
Cr-Commit-Position: refs/heads/master@{#435868}
12 files changed
