fix android icon.png to use RGBA instead of indexed colors
fix android icon.png to use RGBA instead of indexed colors

This caused an error on Play Store metadata update:
Google Api Error: invalidIconImage: Invalid icon image.

And the issue was using color space:
Indexed color (77 colors)

Instead of:
RGBA

Signed-off-by: Jakub Sokołowski <1d3764b91b902f6b45836e2498da81fe35caf6d6@status.im>

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