Rework Device Monitoring Dialog in Quicksettings

If a device owner is active, the layout is changed from a
standard AlertDialog with only one string to a custom dialog
that includes information on Device Owners, and VPN and Network Logging,
if enabled.

BUG: 29748723
BUG: 33126622
Test: Manual, CTS-Verifier tests will be added later

Change-Id: I2bfca9d9d02a42d9c3b17683625eda29e9369666