Toast warning message when non-admin user tries to open dev options.

Developer Settings are only accessible for the Admin users. Added a new toast warning message to be displayed when a non-admin user tries to open the Developer options.

Bug: 259941142
Test: Manually verfied by tapping on the USB debugging option from a Secondary user.
Change-Id: Ibd1b8e19d9130982982ee13ac98cbc1d8f5b8835
2 files changed