Add strict_mode: false

As strict mode is in place, 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)

Flag: NONE
Test: atest ThemePickerRoboTests
Bug: 334089788
Change-Id: I91bd1d7648c42ce482c4b846c37e2beb6d814ffe