Show history and bookmarks in awesomebar results

[jvonitter]

needs #1141

[jvonitter]

When a user begins to enter text into the awesomebar, the search results below should include sites that are in the user's history and bookmarks.
The sites should have a visual indication of whether they are history, bookmark or regular search results.

For reference, desktop Firefox shows this. We should align to it as much as makes sense.

[jvonitter]

Spec is ready: https://trello.com/c/vZoboQMn/360-uis-75-history-bookmarks-in-awesomebar

[keianhzo]

@thenadj I can't find the icons in the spec, can you add them to the Trello card above? It's only the history one, unless the bookmarks one is any different from the current bookmarks icon that we are using in the navigation bar.

[thenadj]

We're using the same icon as for the tray. Use this one:
icon-tray-history.svg.zip

[keianhzo]

@jvonitter @thenadj You can review the new awesome bar spec here that includes support for showing and filtering bookmark and history entries in the awesome bar:
https://send.firefox.com/download/9a58bce1a376fd73/#ZZSzGHI_kuZlWKcfKufDug

[keianhzo]

@thenadj Latest APK with the icon style updates: https://send.firefox.com/download/c42b67bfaee99b45/#STSKCHP3B9fn7vDeNLAI-Q

[thenadj]

Looks good, thank you!