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Now Browser Actions fails when importing to Android studio because all
its classes using resources does not import R file. However, importing
android.support.customtabs.R fails on ninja compile because BUILD.gn sets
the resource package name to android.support.customtabs.browseraction.
This CL changes the package name to android.support.customtabs to allow
importing android.support.customtabs.R and roll out custom-tab-client
change: third-party/custom-tab-client/54788baf5bfbe5bb42977dc52c2f608392e60f72.

Bug: None
Change-Id: I9f58305c2610f049fb750f152e0e22961d2b7482
Reviewed-on: https://chromium-review.googlesource.com/939853
Commit-Queue: Lei Tian <ltian@chromium.org>
Reviewed-by: Bernhard Bauer <bauerb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541253}