docs: Fixing typos in SQLite...Exception docs

The CommonTypos linter gave a warning about typos in the
generated reference doc. While I had the files open, also
edited the summary fragments to conform to style guide.
No changes to source code.

Bug: 263824202
Change-Id: I653f7144e169cf6a3b5a38a3010c7f7973192ea1
Test: [go/abtd docs build]