New sqlite plugin. Axe unneeded requestFileSystem.

ThLatest SQL lite plugin seems to correct issues I was seeing. But it
extension must be used w/ openDatabse when not necessary before.

Also worked on understanding why WRITE_EXTERNAL_STORAGE is required
(it’s file-transfer) and in the process I removed what appears to be
unnecessary. Won’t release this change for a bit; it requires more
testing.