Migrate the usb data session event functions to the class with the
following additional functionalities;
- Support detecting gadget soft pulldown (usually done during configfs
function switch) and report usb data session correctly.
- Support reporting usb data compliance warnings to the class USB
by providing getDataComplianceWarnings call.
- Use boot_clock instead of steady_clock to measure time correctly in
the case of system suspend.
UsbDataSessionMonitor is self-contained and can be migrated to pixel usb
library after feature maturation.
Bug: 297224564
Bug: 296119135
Test: usb data session upload in device and host mode
Change-Id: Iba001933e193935d64cf5fd0a1257d02a4274fb1
