Add dynamic cache size adjustments.
Send resize width/height header as hints.

Change-Id: I96dea2c65bed4635c54899cf4234cf7320cfeef3
Merge remote-tracking branch 'koush/master' into cm-11.0
herp derp

Change-Id: Ic7dc0d19ab6f58f3ab2d38fd08c364a57073d5c5
Merge branch 'master' of https://github.com/koush/ion

# By Koushik Dutta
# Via Koushik Dutta
* 'master' of https://github.com/koush/ion:
  herp derp
  Add dynamic cache size adjustments. Send resize width/height header as hints.