Bug 995157 - Specify default profile when syncing tabs and remote clients. r=rnewman

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https://github.com/mozilla-services/android-sync/commit/7fd50fef23eeb42b798c1afc3ebf557a32b29c5d
Author: Nick Alexander <nalexander@mozilla.com>
Date:   Fri Apr 18 13:11:34 2014 -0700

    Bug 995157 - Part 2: Specify default profile when syncing tabs and remote clients.

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https://github.com/mozilla-services/android-sync/commit/79da665d744d3a0e4c9ad5fa0d53a3b441ae81e2
Author: Nick Alexander <nalexander@mozilla.com>
Date:   Fri Apr 18 15:22:02 2014 -0700

    Bug 995157 - Part 1: Use FORM_HISTORY_AUTHORITY_URI.