No change to logic, only documentation.
This updates Context#getSharedPreferences docs:
* Fix a typo ("thead" -> "thread")
* Formatting: use <p> when appropriate, {@link} to other APIs, limit
the @param to only a single sentence
* Mention getSharedPreferences() may actually perform disk IO (this was
undocumented)
* Mention Editor#apply() as well as #commit()
Fixes: 140137651
Test: make docs
Change-Id: I245371d13d4f317c6c522debcdf7938ab783f897
5272c3776d