Allow remote inset transient bar configuration

Allow an OEM to configure the show transient behavior when using a
RemoteInsetsControlTarget.

Bug: 231351266
Test: manual, atest
com.android.server.wm.DisplayPolicyTests#testCanSystemBarsBeShownByUser

Change-Id: I2555b437ed62ea26f85dade6faa9c3a3cbc24593
Merged-In: I2555b437ed62ea26f85dade6faa9c3a3cbc24593