[TIMOB-24465] Android: Replacing RGB_565 with ARGB_8888

[kopiro]

To avoid funny gradients

JIRA: https://jira.appcelerator.org/browse/TIMOB-24465

[hansemannn]

How about performance: http://stackoverflow.com/a/15178050/5537752 ?

[garymathews]

Yep, ARGB_8888 should be used. It is the default on Android since 4.0 and the recommended configuration for Bitmaps. Also decreases colour banding by increased bits-per-pixel.

We should change all instances in source to use ARGB_8888:

TiBlob.java - Line 581
TiBlob.java - Line 717

This occurrence is to try and save space, but it will also cause colour banding:
TiUIHelper.java - Line 760

[hansemannn]

Thanks Gary! @kopiro can you update those files in this PR as well? Should be added to 6.1.0 as well.

[jquick-axway]

I agree with Gary. We should always be loading images with 32-bit color. Especially since the 565 color format doesn't support alpha transparency. The days of the low-end 24 MB heap limited Android device is pretty much over.

The 3 other files source files Gary mentioned need to be changed as well.

Note:
This change will cause a merge conflict (but easy to resolve) with another change of mine where I too have updated TiDrawableReference to decode with 32-bit color.
https://jira.appcelerator.org/browse/TIMOB-24528

[garymathews]

Close in favour of #8978