Explain why the frameworks/base DateUtilsTest isn't merged with CTS' DateUtilsTest.

Change-Id: Icbdb4e9133a9ae1c1b37f822367e1ac86e9e36cb
Improve the Resource.getQuantityString/getQuantityText documentation.

Natural languages differ so much and in such odd ways that you can't
use getQuantityString as an "if" statement. It's really just for grammaticality.
This is explained well in
http://developer.android.com/guide/topics/resources/string-resource.html#Plurals
but we need to make more of an effort to motivate people to read that, and to
at least get the most important point across if they don't read it.

Change-Id: I549b9f3563462c45f2dea34c558185e0714127cd
Improve DateFormat.format.

Add support for the 'c' format character, required in many non-English locales.
Reimplement 'c' and 'E', and 'L' and 'M', so they correctly interpret 5-count
pattern characters.

Replace the old incorrect class documentation with a pointer to the
well-maintained libcore equivalent and the Unicode UTS to which these two
implementations are supposed to conform.

Deprecate the useless constants for pattern characters. No one sane is going
to write MONTH + MONTH + MONTH + MONTH instead of "MMMM".

Correct the documentation for getLongDateFormat and getMediumDateFormat.

Also fix DateUtils.getStandaloneMonthString for LENGTH_SHORTEST.

Tests are in https://android-review.googlesource.com/53291.

Change-Id: I4dda8b18070f05ccdc11c1f0a9381a9d233db4e8
update preloaded-classes

Remove some preloaded-classes and fix typo for deleting log messages
as the followings during booting.

W/Zygote  (  163): Class not found for preloading: android.bluetooth.
BluetoothAudioGateway
W/Zygote  (  163): Class not found for preloading: android.bluetooth.
HeadsetBase
W/Zygote  (  163): Class not found for preloading: undroid.content.Ab
stractThreadedSyncAdapter$SyncThread

Change-Id: Id02e0cccaeb150f48e12d67b2d691df828842e4c