Add `RustLayerException.ValidateAddressException`

[HonzaR]

Is your feature request related to a problem? Please describe.

A few Synchronizer APIs throw RuntimeException, which is too generic and should be replaced with a more specific one.

Describe the solution you'd like

Replace RuntimeException exception with e.g. RustLayerException.ValidateAddressException for these Synchronizer APIs:

• Synchronizer.isValidShieldedAddr
• Synchronizer.isValidTransparentAddr
• Synchronizer.isValidUnifiedAddr
• Synchronizer.isValidTexAddr

Alternatives you've considered

Also, ensure that all the underlying functions properly state the RuntimeException exception in their contract, i.e., in Backend and TypesafeBackend.

Additional context