Allow virtual device owners to specify custom policies per policy type.

The policy per device and per type is available to the system components via both VirtualDeviceManager and VirtualDeviceManagerInternal. Currently only adding SENSORS polcy type.

Bug: 239152561
Bug: 237278244
Test: atest VirtualDeviceParamsTest, atest VirtualDeviceManagerServiceTest
Change-Id: Id32997d716653306abbff5e9dacf600a0ee9f3e4