Move IndentingPrintWriter to android.util

The old implementation remains in its place for now.

IndentingPrintWriter is still hidden - it will be made public
separately.

Test: atest FrameworksUtilTests:android.util.IndentingPrintWriterTest
Bug: 142281756

Change-Id: Idd2bfa027733ef384b5a676866a89fb3c35b06cb
diff --git a/config/preloaded-classes b/config/preloaded-classes
index 36e73d2..feb0692 100644
--- a/config/preloaded-classes
+++ b/config/preloaded-classes
@@ -6315,6 +6315,7 @@
 android.util.FloatProperty
 android.util.Half
 android.util.IconDrawableFactory
+android.util.IndentingPrintWriter
 android.util.IntArray
 android.util.IntProperty
 android.util.JsonReader$1
@@ -9113,7 +9114,6 @@
 com.android.internal.util.HexDump
 com.android.internal.util.IState
 com.android.internal.util.ImageUtils
-com.android.internal.util.IndentingPrintWriter
 com.android.internal.util.IntPair
 com.android.internal.util.JournaledFile
 com.android.internal.util.LatencyTracker$1