Cache resource values in HalDeviceManager after boot complete

Remove unused value mWifiUserApprovalRequiredForD2dInterfacePriority and
create handleBootCompleted() that cache resource values after boot
completed.

Bug: 250981429
Test: atest HalDeviceManagerTest
Change-Id: I64b2afca0a4bccfea98117bf7e38582e99f89e63
3 files changed