tree d36c58bd4302fbb1526c5982e0570a7b022d2034
parent 00487cf9368df10aab90c5a194667ce56acb49e4
author Jeff Sharkey <jsharkey@android.com> 1494370529 -0600
committer Jeff Sharkey <jsharkey@android.com> 1494370531 -0600

Use "real" free space; refresh on large changes.

For volumes where the OS manages cached data, use the "free space" as
reported by StorageStatsManager, which is the same value shown in
the Settings app and other UI elements.

Also, when the storage space changes significantly, invalidate anyone
who was holding a cached "free space" value.

Test: builds, boots
Bug: 38146029
Change-Id: I4b3a484a8bf32cd137a83f1ea441beca6dc6719a