Initialize SQLite as part of the android runtime.

This ensures that the SQLite library is always correctly configured
and initialized before other framework or application code has
a chance to use it.  This is important because initialization has
to happen at most once so we need to get it right and prevent races.

This change makes it possible to omit the SQLite auto-initialization
workaround from the SQLite library, potentially saving a few cycles
here and there.

Change-Id: Ifbed8685ee44aa1e9c0b391e233b0257fa738e4f