Limit data usage request per uid
Currently, there is no limtation for an app to request
data usage callback, which is dangerous if the app fire
hundreds of thousands requests and potientially this might
cause OOM if the apps don't free them.
Test: atest NetworkStatsObserversTest#testRegister_limit
Bug: 229103088
Change-Id: I8299f46fd47a82ec9b25ba2e0d3c95db5512c331
(cherry picked from commit f3c946278c83ab07ec18b5eb258a54865fc0993f)
Merged-In: I8299f46fd47a82ec9b25ba2e0d3c95db5512c331
3 files changed