Adds 'more details' hyper link.

Adds a 'more details' hyper link in the footer when options are disabled
by admin.

Test: make ROBOTEST_FILTER=ScreenTimeoutSettingsTest RunSettingsRoboTests
Bug: 180314728
Change-Id: I880ccd73f4b2ef0b695619ef42ec87559dc2b65b
2 files changed