Cleanup: fix some compiler warnings (mostly deprecations, javaClass)

plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/synthetic/descriptors/AndroidSyntheticPackageFragmentDescriptor.kt

@@ -84,7 +84,7 @@ class AndroidSyntheticPackageFragmentDescriptor(
         override fun getContributedVariables(name: Name, location: LookupLocation) = properties().filter { it.name == name }
 
         override fun printScopeStructure(p: Printer) {
-            p.println(javaClass.simpleName)
+            p.println(this::class.java.simpleName)
         }
     }
 }

plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/synthetic/descriptors/PredefinedPackageFragmentDescriptor.kt

@@ -55,7 +55,7 @@ class PredefinedPackageFragmentDescriptor(
                 calculatedFunctions().filter { nameFilter(it.name) && kindFilter.accepts(it) }
 
         override fun printScopeStructure(p: Printer) {
-            p.println(javaClass.simpleName)
+            p.println(this::class.java.simpleName)
         }
     }
 }

plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/synthetic/res/androidResources.kt

@@ -48,7 +48,7 @@ class ResourceIdentifier(val name: String, val packageName: String?) {
     // Without packageName
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
-        if (other?.javaClass != javaClass) return false
+        if (other == null || other::class.java != this::class.java) return false
 
         other as ResourceIdentifier