UsbContaminant dialog

Bug: 119642987
Bug: 117330206
Bug: 77606903

Test: Ran the following sequence:
1. Add simulated port: dumpsys usb add-port "matrix" ufp
2. Set contaminant present to true:
   dumpsys usb set-contaminant-status "matrix" true
   Contaminant present notifcation shows up and dialog pops up upon
   clicking the notification.
3. Set contaminant present to false:
   dumpsys usb set-contaminant-status "matrix" false
   Contaminant present notification is dismissed and the safe to use
   notification shows up.

Change-Id: I33d22caafbedb2a21a0f61f663ebddf5c9e3f84b