Adding broadcast receiver to handle SESSION_COMMIT broadcast

> Disabling Install shortcut broadcast for O and above
> Adding a preference to control automatic icon addition on homescreen
> Adding icons on homescreen for new installs based on the above preference

Bug: 32920609
Bug: 27967412
Change-Id: I92e5cb7c841fb445dc8bc058d975f212ee54f8d1
diff --git a/src/com/android/launcher3/SettingsActivity.java b/src/com/android/launcher3/SettingsActivity.java
index cedeb39..552e24a 100644
--- a/src/com/android/launcher3/SettingsActivity.java
+++ b/src/com/android/launcher3/SettingsActivity.java
@@ -25,6 +25,7 @@
 import android.preference.PreferenceFragment;
 import android.provider.Settings;
 import android.provider.Settings.System;
+import android.support.v4.os.BuildCompat;
 
 /**
  * Settings activity for Launcher. Currently implements the following setting: Allow rotation
@@ -72,6 +73,11 @@
                 mRotationLockObserver.onChange(true);
                 rotationPref.setDefaultValue(Utilities.getAllowRotationDefaultValue(getActivity()));
             }
+
+            if (!BuildCompat.isAtLeastO()) {
+                getPreferenceScreen().removePreference(
+                        findPreference(SessionCommitReceiver.ADD_ICON_PREFERENCE_KEY));
+            }
         }
 
         @Override