autosleep: Add browser test to test suspend and wake up in kiosk session

Add basic setup for browser tests for the scheduled suspend feature
that allows testing the feature with mocked time. In addition to
that add tests to confirm the functionality of suspending and waking up
the device.

Bug: b:329616257
Test: browser_test --gtest_filter=*DeviceWeekly*
Change-Id: I3df70792e3a4c01c0e2bdcd587a9f8e6981bdaa6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5377857


Commit-Queue: Fahad Mansoor <fahadmansoor@google.com>
Reviewed-by: Irina Fedorova <irfedorova@google.com>
Reviewed-by: Emmanuel Arias Soto <eariassoto@google.com>
Cr-Commit-Position: refs/heads/main@{#1283143}