Set last report configuration when attaching process

The process has received the configuration after bindApplication.
It is unnecessary to send a process configuration change by an
uninitialized last configuration from starting activity
(realStartActivityLocked -> r.setProcess).

Also remove a duplicated invocation of updateConfiguration
because super.onRequestedOverrideConfigurationChanged has
called onConfigurationChanged that also calls updateConfiguration.

Bug: 148604688
Test: atest WindowProcessControllerTests
Test: Enable trace and launch an activity. There should not have
      a configChange between bindApplication and activityStart.
Change-Id: I7afa1278728fbb996f06d74023cc00930eadd3fc