Refactor native utils

[tomasMizera]

We need to refactor our current android/ios and parts of input utils to something like native utils. Native utils would be a base class and platforms would define the implementation.

Pros:

• we won't need to decide on many places whether to call androidUtils or iosUtils or ...
• we get rid of dependency between inputUtils and android/ios utils
• we will compile only those utils that are needed for the platform and won't compile other (as it is now)