Get rid of 'class object' usages in code and builtins

Replace some comments and library usages as well

plugins/android-compiler-plugin/testData/codegen/android/fragment/0.kt

@@ -10,7 +10,7 @@ import kotlinx.android.synthetic.layout.*
 
 class R {
     class id {
-        class object {
+        companion object {
             val login = 5
         }
     }

plugins/android-compiler-plugin/testData/codegen/android/fragment/1.kt

@@ -10,7 +10,7 @@ import kotlinx.android.synthetic.layout.*
 
 class R {
     class id {
-        class object {
+        companion object {
             val login = 5
         }
     }

plugins/android-compiler-plugin/testData/codegen/android/view/0.kt

@@ -8,7 +8,7 @@ import kotlinx.android.synthetic.layout.view.*
 
 class R {
     class id {
-        class object {
+        companion object {
             val container = 0
             val login = 1
         }

plugins/android-compiler-plugin/testData/codegen/android/view/1.kt

@@ -8,7 +8,7 @@ import kotlinx.android.synthetic.layout.view.*
 
 class R {
     class id {
-        class object {
+        companion object {
             val container = 0
             val login = 1
         }