Add IPA statistics to bugreport

-So far, It's hard to capture the IPA related debug info
 when issue happen because user need run adb command (cat /sys/kernel/debug/ipa/*)
 to trigger IPA dump the debug message.
 So add IPA statistics to bugreport for IPA related issues.
-porting from ag/9769398

Bug: 140913343
Test: 1. build pass
      2. make sure ipa_statistics_msg could be dumped into dumpstate_board.bin
         in bugreport
Change-Id: I86aa56317230890339c7351d8ba0c69c3ba6545f