Few fixes for low overhead method tracing

There are a few fixes required for low overhead method tracing:
1. Release the allocated buffer when thread is being destroyed.
2. Allocate a new buffer on thread creation if tracing is in progress.
3. Flush the buffer and close the file oncer iterating over all threads
   is done.
4. Iterate trace buffer entries from the end of the buffer. We stores
   entries starting from the end, so flush them in the same order.

Bug: 352518093
Test: Manual testing
Change-Id: Icc7a58902a2bbc96efc98b8635ba1e04a62a372b

0 files changed, 0 insertions, 0 deletions