Use the new unitsContentDescription from Formatter.formatBytes()
Fix: 318780411
Test: manual - on AppDataUsage
Test: unit test
Change-Id: I55079c83db2e46a48f49f746f2371825ec0bb029
Content description for usage will be added later.
Bug: 318780411
Test: manual - on AppDataUsage
Test: unit test
Change-Id: I3990218395dfd7553554346ea8ef00368ba57589