Reduce lock contention when starting process (2/N)

The isFactoryTestProcess doesn't need to be locked because
mFactoryTest is final and mTopComponent is only set when booting.

Bug: 204870457
Test: CtsWindowManagerDeviceTestCases
Change-Id: I2f98edb7b64ea05ffca78f35b74a46b94e694f12
4 files changed