The documentation says before that sentence:
"We require that for each bitmap the developer provides the highest resolution version of it. The system will perform a high quality downscaling of the bitmap when needed on lower density screens."
So more looks like a typo and the proper value should be 180x180px, instead of that 144x144px.
The documentation says before that sentence:
"We require that for each bitmap the developer provides the highest resolution version of it. The system will perform a high quality downscaling of the bitmap when needed on lower density screens."
So more looks like a typo and the proper value should be 180x180px, instead of that 144x144px.