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As a first step of simplifying CustomTabActivity, I extract all the code related
to TrustedWebActivityUi and use Dagger to organize dependencies for
TrustedWebActivityUi.

I make use of recently introduced activity lifecycle dispatching: https://crrev.com/c/1283256

Bug: 887926
Change-Id: Ia36a026a7f297e7c0f101189945c44454d12fa6e
Reviewed-on: https://chromium-review.googlesource.com/c/1281102
Commit-Queue: Pavel Shmakov <pshmakov@chromium.org>
Reviewed-by: Yusuf Ozuysal <yusufo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#603122}