Move RadioButtonPreference from Settings to SettingsLib

Bug: 138620011
Test: build, make RunSettingsLibRoboTests
Change-Id: I49fc53503eb5bb3cdd6f2bae66e5d0b7808e5d3d
diff --git a/packages/SettingsLib/Android.bp b/packages/SettingsLib/Android.bp
index b532621..7760e0e 100644
--- a/packages/SettingsLib/Android.bp
+++ b/packages/SettingsLib/Android.bp
@@ -23,6 +23,7 @@
         "SettingsLibBarChartPreference",
         "SettingsLibProgressBar",
         "SettingsLibAdaptiveIcon",
+        "SettingsLibRadioButtonPreference",
     ],
 
     // ANDROIDMK TRANSLATION ERROR: unsupported assignment to LOCAL_SHARED_JAVA_LIBRARIES