Fix CalendarView to show the month title properly.

Step to reproduce:
Do this test on a Tablet (i.e. do in multi-pane layout)
1. Settings > Date & time > Uncheck the Automatic date & time checkbox.
2. Select 'Set date' and set the month to January and Done.
3. Re-select 'Set date' then you will find no month title just above the calendar.

Change-Id: I2489b454a4526be13f1fbdc61a72edcd6b6942a0
Revert "Vectorize bitmap operations on A15 too"

This reverts commit 6c117bb00bc238b7df1bea423e04b5c5de2c27a2.
Revert "core/jni/android/graphics: Cache copy of pre-scaled Bitmaps"

This reverts commit f189a358db81010571b5ca173eaa8c18bb309b0c.
Revert "frameworks/base: vectorize Bitmap operations"

This reverts commit 664e9c25a99a98ec17e5a022d689c3309417710c.