Replace usage of java.lang.Class with kotlin.reflect.KClass

[veyndan]

When generating an equals method from commonMain code, Studio suggests the usage of if (other == null || this::class != other::class) return false instead of if (javaClass != other?.javaClass) return false. I'm just calling this out because of the following line:

androidx/paging/paging-common/src/main/kotlin/androidx/paging/TransformablePage.kt

Lines 90 to 93 in 88877d7

	// Do not edit. Implementation generated by Studio, since data class uses referential equality
	// for IntArray.
	override fun equals(other: Any?): Boolean {
	if (this === other) return true

Test: ./gradlew test connectedCheck
Bug: 270612487