tree 315631bcab4bbb1a5254bebae872622ee2a49ee7
parent cc25dd924bee6e8c42ea3b9a5ab46ec47fdb7682
author Tim Zheng <timzheng@google.com> 1504140379 -0700
committer Tim Zheng <timzheng@google.com> 1505431941 -0700

Add a backup manager constants secure settings.

This change add one secure settings which is a key value list consisting
of 7 individual settings; it also provides a class to get these settings
and use the default values specified in default.xml file when the settings
are missing.

This is the first part of a 2 part change. A subsequent change will use
these settings in backup service manger for setting up backup frequency.

Test: This change builds. Manual tests will be included in part 2 of the
change.
Bug: 63351792
Change-Id: I62baddbf3e0b96af6b7de3dfdeac3479e5b3ded8