Revert "Bug 985888 - [DSDS] Display currently in-use SIM cards on call buttons. r=rik"

This reverts commit 1606cc3008ff06e146c070a60e70a1c074552304.
Bug 987024 - [DSDS] Cache ril.xxx.defaultServiceId in MSAB to avoid IO thrashing. Fixed after being backed out in bug 980982. r=Rik, francisco
Bug 985888 - [DSDS] Display currently in-use SIM cards on call buttons. r=rik
Bug 987024 - Remove MockNavigatorSettings.mSyncRepliesOnly to pass linting. r=rik over IRC
Merge pull request #17562 from crh0716/974253_v2

Bug 974253 - Set preferred network type on startup based on the user preference r=jaoo
Merge pull request #17519 from crdlc/bug-986047

Bug 986047 - [B2G][Dialer]Cannot select Add Comment when creating a new ...
Revert "Revert "Bug 986753 - [Tarako] Alarm Clock can get killed in the background and never ring." for suspicion of breaking gaia integration tests"

This reverts commit a968d8cd00fa1f370a2ea7e3994b5bb5391affd7.