Doris Ling 73b6e19968 Disable the usage summary when there's no usage data.
- when the preference is initialized, check for the network's overall
total usage. If there is no data available, disable launching the detail
page.

Change-Id: Ie81a5471de134bac63dedd3c39f4afe44201efe5
Fixes: 74451774
Fixes: 35855928
Test: make RunSettingsRoboTests
2018-06-20 15:26:43 -07:00
2018-04-20 12:52:29 -07:00
2015-04-13 09:21:39 -07:00
2017-10-13 15:59:03 -07:00
2018-04-20 12:52:29 -07:00
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3.1 GiB
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Kotlin 10.2%