Revert "Use androidx LifecycleObserver for wiring up controller ..."

Revert submission 13804074-controller-lifecycle

Reason for revert: ag/182373167, see a crash related to this new cl.
Reverted Changes:
I39ac69f24:Use androidx LifecycleObserver for wiring up contr...
I086620e31:Add javadoc about lifecycles for xml defined Contr...
Fix: 182373167

Change-Id: I7e6d2e9e6fd363a3afdd3dbab24e7c3b36e9ed29
diff --git a/src/com/android/settings/dashboard/DashboardFragment.java b/src/com/android/settings/dashboard/DashboardFragment.java
index 7acbd19..1b2be80 100644
--- a/src/com/android/settings/dashboard/DashboardFragment.java
+++ b/src/com/android/settings/dashboard/DashboardFragment.java
@@ -27,7 +27,6 @@
 
 import androidx.annotation.CallSuper;
 import androidx.annotation.VisibleForTesting;
-import androidx.lifecycle.LifecycleObserver;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceGroup;
 import androidx.preference.PreferenceManager;
@@ -45,6 +44,7 @@
 import com.android.settings.widget.PrimarySwitchPreference;
 import com.android.settingslib.core.AbstractPreferenceController;
 import com.android.settingslib.core.lifecycle.Lifecycle;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
 import com.android.settingslib.drawer.CategoryKey;
 import com.android.settingslib.drawer.DashboardCategory;
 import com.android.settingslib.drawer.ProviderTile;