[DSDS][Gaia][Sim Manager] support always ask feature

- add 'always ask' option
- add related unit test
Bug 957100 - [Settings] add marionette for b2g-improve and feedback page
Bug 972514 - [B2G][Email] ActiveSync message state changes from server not synchronized error "Failed to parse a message: Error: Bad body type: undefined" thrown. r=mcav
Merge pull request #16585 from asutherland/email-asflagfix

Bug 972514 - [B2G][Email] ActiveSync message state changes from server not synchronized error "Failed to parse a message: Error: Bad body type: undefined" thrown. r=mcav
Merge pull request #16243 from EragonJ/bug-972150

Bug 972150 -[DSDS][Gaia][Sim Manager] support always ask feature
Merge pull request #15459 from cctuan/957100

Bug 957100 - [Settings] add marionette for b2g-improve and feedback page r=crh0716