Make sure SearchDialog.mSearchable != null in key handlers

This change adds checking that the searchdialog is initialized
properly to a few key event listeners where it was missing
before.

Also makes sure that the search dialog is not shown if the
global search is requested but the global search provider
cannot be found.

Should fix http://b/issue?id=1982128
"Device rebooting after search results"
where SearchDialog.onKeyDown() threw an NPE

core/java/android/app/SearchDialog.java

@@ -28,7 +28,6 @@ import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.content.pm.PackageManager.NameNotFoundException;
-import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.database.Cursor;
 import android.graphics.drawable.Animatable;
@@ -322,14 +321,12 @@ public class SearchDialog extends Dialog implements OnItemClickListener, OnItemS
         if (!globalSearch && mSearchable == null) {
             globalSearch = true;
             mSearchable = searchManager.getSearchableInfo(componentName, globalSearch);
+        }
 
-            // If we still get back null (i.e., there's not even a searchable info available
+        // If there's not even a searchable info available for global search, then really give up.
-            // for global search), then really give up.
+        if (mSearchable == null) {
-            if (mSearchable == null) {
+            Log.w(LOG_TAG, "No global search provider.");
-                // Unfortunately, we can't log here.  it would be logspam every time the user
+            return false;
-                // clicks the "search" key on a non-search app.
-                return false;
-            }
         }
 
         mLaunchComponent = componentName;
@@ -702,6 +699,9 @@ public class SearchDialog extends Dialog implements OnItemClickListener, OnItemS
     @Override
     public boolean onKeyDown(int keyCode, KeyEvent event) {
         if (DBG) Log.d(LOG_TAG, "onKeyDown(" + keyCode + "," + event + ")");
+        if (mSearchable == null) {
+            return false;
+        }
 
         // handle back key to go back to previous searchable, etc.
         if (handleBackKey(keyCode, event)) {
@@ -738,6 +738,9 @@ public class SearchDialog extends Dialog implements OnItemClickListener, OnItemS
             if (DBG_LOG_TIMING) {
                 dbgLogTiming("onTextChanged()");
             }
+            if (mSearchable == null) {
+                return;
+            }
             updateWidgetState();
             if (!mSearchAutoComplete.isPerformingCompletion()) {
                 // The user changed the query, remember it.
@@ -1563,6 +1566,9 @@ public class SearchDialog extends Dialog implements OnItemClickListener, OnItemS
          */
         @Override
         public boolean onKeyPreIme(int keyCode, KeyEvent event) {
+            if (mSearchDialog.mSearchable == null) {
+                return false;
+            }
             if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_DOWN) {
                 if (mSearchDialog.backToPreviousComponent()) {
                     return true;