Create ButtonPreference

Bug: 201577970
Test: robotest

Change-Id: I2be43bc41405a529961ded3371d7c382bb1fdf57
diff --git a/packages/SettingsLib/Android.bp b/packages/SettingsLib/Android.bp
index b266df5..fcf2282 100644
--- a/packages/SettingsLib/Android.bp
+++ b/packages/SettingsLib/Android.bp
@@ -49,6 +49,7 @@
         "SettingsLibTwoTargetPreference",
         "SettingsLibSettingsTransition",
         "SettingsLibActivityEmbedding",
+        "SettingsLibButtonPreference",
     ],
 
     // ANDROIDMK TRANSLATION ERROR: unsupported assignment to LOCAL_SHARED_JAVA_LIBRARIES