Merge changes I9f21ce95,Ib0530b9d,I981d9fa6,Icc60dd06,I902ba6b4, ... into mnc-dr-dev

* changes:
  logd: worst uid record watermark
  logd: log buffer switch to std::list
  logd: white and black switch to std::list
  logd: logtimes switch to std::list
  logd: prune 10% or 256 entries max
  logd: sizes > 1M prune in smaller batches