timob-12961: Android: TiNinePatchHelper crash after upgrading to 3.0.2

[pingwang2011]

https://jira.appcelerator.org/browse/TIMOB-12961
Test case in JIRA.

[ayeung]

Functional test failed. Looks like it no longer detects nine-patch images correctly after this change. I left a test case in the jira ticket with the nine-patch image.

[pingwang2011]

Updated. Ready for review again.

[ayeung]

Code reviewed and functionally tested. Request Accepted.

[atrbx5]

start having this issue after using 9path for window background sdk 3.1.2 android platform 2.3 / 4
it happens very quickly after opening tabgroup 2 times
or after 5 min not very active using the app

09-22 22:48:12.858: E/TiApplication(11358): (main) [18577,433187] Sending event: exception on thread: main msg:java.lang.OutOfMemoryError: bitmap size exceeds VM budget; Titanium 3.1.2,2013/08/14 12:46,5ceaff8
09-22 22:48:12.858: E/TiApplication(11358): java.lang.OutOfMemoryError: bitmap size exceeds VM budget
09-22 22:48:12.858: E/TiApplication(11358): at android.graphics.Bitmap.nativeCreate(Native Method)
09-22 22:48:12.858: E/TiApplication(11358): at android.graphics.Bitmap.createBitmap(Bitmap.java:507)
09-22 22:48:12.858: E/TiApplication(11358): at org.appcelerator.titanium.util.TiNinePatchHelper.cropNinePatch(TiNinePatchHelper.java:125)
09-22 22:48:12.858: E/TiApplication(11358): at org.appcelerator.titanium.util.TiNinePatchHelper.process(TiNinePatchHelper.java:49)
09-22 22:48:12.858: E/TiApplication(11358): at org.appcelerator.titanium.util.TiFileHelper.loadDrawable(TiFileHelper.java:306)
09-22 22:48:12.858: E/TiApplication(11358): at org.appcelerator.titanium.util.TiUIHelper.buildBackgroundDrawable(TiUIHelper.java:508)