Threadpool can now be configured/joined if needed with
configureRpcThreadpool() / joinRpcThreadpool().
Bug: 31226656
Test: mma
Change-Id: I0d7d9924cc8c8851cc2b61ebdae906204909890e
The default implementation loads the device's legacy keymaster hal
and wraps in a softkeymasterdevice if the capabilities of the
device is less than keymaster 2.
Test: builds
Bug: 32020919
Change-Id: Ia7e274673b77c2712c386d573715ed3725b0c158