Bug: 8161354
Change-Id: I17c23f56dd3bc2f27726556bf2c5a9d5520bd172

This creates a new DictionaryInfoUtils class and moves a bunch
of static methods there for later usage.

Change-Id: Iecb0643e6029a7be36bd6cb36aa918c40e6d8c6a

Change-Id: Ic56167f952a7f4449da366e1e81610e72c966086

Change-Id: I6009b3c1950ba32b7f1e205a3db2307fe0cd688e

This change also gets rid of several compiler warnings.

Change-Id: I23962edaadad18a6e0395d528af17b909dcf5dad

This change adds basic support for an external dictionary provider.
It adds methods for reading the dictionary itself from an asset in
the dictionary provider package directly, obtaining the file name
through the ContentProvider interface; it also adds a way of getting
the data through an InputStream and copying the file locally.

Incidentally this change also adds the code needed to listen for
updating the dictionary provider package and reloading it in time.

This change also goes hand-in-hand with Iab31db6e, which implements
the small closed part of this.

Issue: 3414944

Change-Id: I5e4fff99a59bb99dbdb002102db6c90e6cb41c8a