Pixelstats: monitor wireless online and ptmc id by uevent

Listen to uevent directly instead of cat file node

Bug: 159098630
Test: adb shell cmd stats print-logs # stats log on
      logo:
      I statsd  : { uid(1000) 1592294521 1018321909202 (105008)0x10000->com.google.pixel[S] 0x20000->1[I]  }
Change-Id: If83817d0ece42aa938c06cd96459391d296297d0
4 files changed