Add conent description for talkback to announce, if the progress bar is 50%, then before modification is "Progress bar", and after modification is "50% Progress bar".
Bug: 146811265
Test: Add following unit test case to test if content description is correct or not:
createPref_progressBarShouldSetPercentageContentDescription().
Change-Id: I71483df8e12f08c4c8c96ab3964666bf97872a83
Running Settings Robolectric tests
The full suite
$ croot
$ make RunSettingsRoboTests
Running a single test class
$ croot
$ make RunSettingsRoboTests ROBOTEST_FILTER=<ClassName>
For example:
make RunSettingsRoboTests ROBOTEST_FILTER=CodeInspectionTest
You can also use partial class name in ROBOTEST_FILTER. If the partial class name matches multiple file names, all of them will be executed.