🤝 Remove image_provider from customtabs Manifest.
🤝 Remove image_provider from customtabs Manifest.

This is unused as far as I can see and it also prevents installation
of multiple apps using this library on the same device.

Clients who want to use BrowserServiceFileProvider can include it
in their own manifest.

Change-Id: Ibabb093ae9edb76f699d9fdf69c012e8da1853a4
Reviewed-on: https://chromium-review.googlesource.com/c/1365333
Reviewed-by: Pavel Shmakov <16a135935ec2b9f144baf56e28567f011e85f6c0@chromium.org>
Reviewed-by: Yusuf Ozuysal <d3f962758524eff253548720e3053cc6af4b3d27@chromium.org>
Commit-Queue: Peter Conn <614d279ee032c8ceaf5cecc64e36afeeeb5e07e2@chromium.org>

GoogleChrome/custom-tabs-client