"Google copied it's user interface and general device layout"
Well, no, although that's certainly the Apple worldview. Fact is, both iPhone and Android came out due to a convergence of technologies at pricepoints which made smartphones, as we now know them, practical.
Think low power processors/GPS/WiFi, low cost hi-res color touch LCDs, flash memory, MEMS/sensors, high speed cellular data connectivity, etc. The iPhone and Android phones came out essentially simultaneously, and both had been in development for years before they were announced.
Nokia's (and Blackberry's) problem was mostly one with which market leaders have had a long tradition - the unwillingness to compete against or see beyond their own success.