變更 set date, time 的 dialog 大小..

先在 framework/base/core/res/res/drawable-hdpi 看到 timepicker_down_normal.9.png 這個圖。
然後 framework/base/core/res/res/layout/number_picker.xml 使用到 timepicker_down_normal.9.png
然後 framework/base/core/java/android/widget/NumberPicker.java: inflater.inflate(R.layout.number_picker, this, true)
然後就一堆...

• core/java/android/widget/TimePicker.java
• core/java/android/widget/DatePicker.java

DateTimeSettings -- TimePickerDialog(layout/time_picker_dialog) -- TimePicker