Updating compileSdkVersion to 34 causes deceprecation errors for newInstance()

[ahinton-league]

The following code generated by showkase has a deprecation warning when we update our Android SDK version to 34

public fun Showkase.getMetadata(): ShowkaseElementsMetadata {
    try {
      val showkaseComponentProvider =
          Class.forName("REDACTED").newInstance() // deprecated!!!
          as ShowkaseProvider
      return showkaseComponentProvider.metadata()
    } catch(exception: ClassNotFoundException) {
      error("The class wasn't generated correctly. Make sure that you have setup Showkase correctly by following the steps here - https://github.com/airbnb/Showkase#Installation.")
    }
}

Added in API level 1 Deprecated in API level 34
public T newInstance ()
This method was deprecated in API level 34. This method propagates any exception thrown by the nullary constructor, including a checked exception. Use of this method effectively bypasses the compile-time exception checking that would otherwise be performed by the compiler. The Constructor.newInstance method avoids this problem by wrapping any exception thrown by the constructor in a (checked) InvocationTargetException .
The call
clazz.newInstance()

can be replaced by
clazz.getDeclaredConstructor().newInstance()

[ahinton-league]

Our development policies include treating warnings as errors. This breaks all our builds and prevents us from adopting compose 1.5 and android 34.

[ahinton-league]

Dup of #335