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
use Calendar in DateUtils format method

The DatePickerDialog is using DateUtils to format the dialog's title
and the DateUtils class does not work with dates outside to the
specified range.
For example, if user selects 2038-03-07, DatePickerDialog shows
1902-01-30 on Title.
The reason for the DateUtils class not being able to format dates
outside the range of 1902 and 2036 is because internally it is using
the Time class which does not support such dates.
To fix it, use Calendar class in DataUilts format method.

Steps to reproduce:
1. Settings -> Date & time
2. uncheck Automatic date & time
3. Set Date
4. choose any date before 1902 or after 2037
5. update wrong date on Title

Bug: https://code.google.com/p/android/issues/detail?id=13050
Change-Id: I003266765751b5c340426af84daef271f39f771e