Merge changes Ifb61fe59,I3439a8f0,I5c19dc60 into sc-dev

* changes:
  Add total DMA-BUF heap pool size information to dumpsys meminfo
  Add total size of DMA-BUFs exported to 'dumpsys meminfo'
  Rename getIonMappedSizeKb to getDmabufMappedSizeKb