c8613c7930
- the chart usage data is computed using difference between current time and the timestamp from the usage data. In the test, we are using actual current time and mock usage data. As the current time varies the test computating sometimes results in some negative data, and makes the comparison unpredictable. Change to use a fix "current" time in the test so that the time difference in computation will be constant. Fixes: 77824818 Test: make RunSettingsRoboTests Change-Id: I2d8c166839775469d30015317afdc04eb3d9a2b4