Switch Databases to WAL mode. Set autocommit to 100.

Change-Id: I852f439e2565d1732a55548f1519cbd2c77ebd64

frameworks/base:
Add check for READ ONLY databases (WAL can be used with R/W DBs only).

CRs-Fixed: 278062

Change-Id: Iadcbd868c1ef47e75bbdf5343868e542353ac9f2

frameworks/base: Use WAL mode for selected databases. Others use default mode: DELETE.

Change-Id: I4cb3c87a751f83bf47a73c4652ce1d8bf64a60fd

frameworks/base: Disable fsync in selected databases.

As an add-on to the WAL optimization, disable fsync in databases where
corruption and data consistency aren't a problem.

Change-Id: I41a85fa55ea71dc8dd3c4011102c28d2c1db8d3d