Add Intent picker with explicit/implicit intents

[vpratfr]

For some intents, such as navigation or maps, some apps don't support the google way or don't follow any standard intent patterns.

Would be good to have an intent picker that could be initialized with some explicit intents (launching a particular app if available) and all apps responding to the default implicit intent (which could reply to the supposed standard intent for that action).

Idea comes from http://datamoil.blogspot.fr/2011/04/android-universal-intent-to-start.html