This worked for me:
It’s metadata added by tools like Photoshop that isn’t even honored by Android. Strip it.
brew install exiftool
find . -path '*src/main/res/*' -name '*.png' -exec exiftool -overwrite_original -all= {} \;
Source: https://groups.google.com/forum/#!msg/adt-dev/rjTQ_STR3OE/-UcNQRISTKsJ
P.S. Tested on Mac only.