Argument exception is faced when special character is used into categories option of the method "$fh.push"

Issue

• Argument exception is faced when special characters is used into categories option of the method "$fh.push"

• When setting categories for $fh.push in the FH Android SDK users will receive an argument exception when using special characters in the category string and an example of this would be *"test@test.com"*. Following the error result for this example.

  java.lang.IllegalArgumentException: test@test.com does not match [a-zA-Z0-9-_.~%]{1,900}