Rename resetInternalState to resetInternalStateLocked

resetInternalState method is almost always called within a synchronized
block (except in the constructor of TSMS ) and it also calls several
methods that require a lock. Hence, to keep consistency, we rename this
method to resetInternalStateLocked.
This is a preparation CL for Bug 63041121.

Bug: 63041121
Test: None
Change-Id: I92a81adb10da58ab81cfef8a995cfd9e37020825