Rename sigrok-logo-notext.png to pulseview.png. This is more specific and prevents any potential issues e.g. when multiple distro packages might ship with a generic file like sigrok-logo-notext.png that's supposed to be installed in the same place.
Bring back sigrok-logo-notext.png (needed on Android). On Android sigrok-logo-notext.png is used as app icon, and the build thus fails if it is not available. Changing android/custom_rules.xml to use the SVG version instead doesn't seem to work. It appears Android doesn't really support SVGs as app icons, or at least not without further changes. Continue using the PNG for now to keep the Android build in a working state.
icons: Resized icons to 24x24