Make dumpstate vibrate immediately.

Previously, the vibration was not performed until after stacks
were gathered which takes a long time.  Moved the vibration
to happen earlier so we provide better user feedback for the
three-button salute when collecting a bug report.

Deleted some dead code for playing begin/end sounds.

Improved the timing measurement code to help track down why
bug reports are so slow.  (They take over a minute now which
can cause us to lose valuable diagnostic information.)

Bug: 17474152
Change-Id: Iac73f7993d7dc85196aad96f459b22fd4a710f94