ANDROID: mm: Throttle rss_stat tracepoint

Previously we were throttling rss_stat tracepoint by checking for 512KB
boundary cross over. We removed that because upstream suggested eBPF or
other ways. However right now, we don't have support for those. Let us
re introduce the patch to throttle and avoid large number of events
which are causing data loss.

Bug: 145972256

Change-Id: I4132133aa36163430069b3ca2f57443940fb90b3
Signed-off-by: Joel Fernandes <joelaf@google.com>