[App Management] Replace == to === in JavaScript.

This CL changes all the "==" in JavaScript to "===", to adhere the style guide.

Bug: 906508
Change-Id: I77961c553c71decb313560b5cadf89c28fda99c1
Reviewed-on: https://chromium-review.googlesource.com/c/1454111
Reviewed-by: Eric Willigers <ericwilligers@chromium.org>
Reviewed-by: calamity <calamity@chromium.org>
Commit-Queue: Cecilia Ni <ceciliani@google.com>
Cr-Commit-Position: refs/heads/master@{#629832}
3 files changed