[Signin][Android] Add hasCapability() to AccountManagerDelegate API

This CL adds hasCapability() to AccountManagerDelegate API and
populates the minor mode cache when accounts gets populated or changed
on device.

Bug: 1206249
Change-Id: Ia2a4dc35bc7fd2344fd35447d67ccd4be4816ce6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2910779


Commit-Queue: Alice Wang <aliceywang@chromium.org>
Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Cr-Commit-Position: refs/heads/master@{#886230}