Frameworks/base: Compile-time optimize SQLiteConnection

Do not cache compiled regular expression and date formatter. Both
cannot be compile-time created, are expensive at preloading time,
and only used in the rare case of dumping the connection (mainly
on errors).

Bug: 19498458
Bug: 19542228
Change-Id: Ia38491a3f852ccf699b815ff05289b338e932f2a