[Android] Remove force promo state update in BookmarkPromoRender tests

Updating the promo state forcefully is not required for these tests.
This cl does not change the behavior of the tests. It changes how the
environment is set up.

This cl also enables testPersonalizedSigninPromoInBookmarkPage test.

Bug: 1123478, 1133426
Change-Id: I4382f857ca1e91676404fce1a1c6e76c315e4493
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2517684


Reviewed-by: Marc Treib <treib@chromium.org>
Commit-Queue: Tanmoy Mollik <triploblastic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824830}