stagefright: add rendering statistics

 - adds extra fps statistics
 - report via dumpsys
 - prints statistics before reset at the end of playback onto
   logcat
 - adds resume latency, from play_l to render
 - adds seek latency, from seek_l to render
 - enables using persist.debug.sf.statistics 1
 - prints all statistics when seek or resume is issued

libstagefright: print seek statistics even when paused

 - if seek is issued during paused state, SEEK_PREVIEW flag is set
   and statistics needs to be printed even if that happens.

add 64-bit compatibility

Change-Id: Ibba66a03f1290fef7c1cfeb7d400d1faf1a7a00d