Set strict_mode to true

The default strict_mode is now set to true. We are encourage teams to write tests in strict_mode to make tests Bivalent (able to run on device and devicelessly)

Ignore-AOSP-First: Due to merge conflicts, will submit in AOSP later after these batch of CLs are merged in git_main
Test: atest MyRoboTests
Bug: 334089788
Change-Id: I3098e2c1ef1b5fd2ee1a98950db5e4f2e8d87d1e