Add more data stall recovery info

- add recovered: Whether the data stall is recovered.
- add duration: The elapsed time between start of the
                data stall and result of current action.
Bug: 178670946
Test: atest FrameworksTelephonyTests
Change-Id: If5c7e8d21164c418da1130be4adc023b8946fe16
Merged-In: If5c7e8d21164c418da1130be4adc023b8946fe16
(cherry picked from commit 305b7201)