First pass at adding "Searchable" infrastructure

AndroidManifest.xml

@@ -27,6 +27,9 @@
     <uses-permission android:name="com.fsck.k9.permission.READ_ATTACHMENT"/>
     <application android:icon="@drawable/icon" android:label="@string/app_name" android:name="K9"
         >
+        <meta-data android:name="android.app.default_searchable"
+                   android:value=".Search" />
+
         <activity
             android:name="com.fsck.k9.activity.Accounts"
             android:label="@string/app_name">
@@ -183,6 +186,17 @@
                 <category android:name="android.intent.category.BROWSABLE" />
             </intent-filter>
         </activity>
+        <!-- Search Activity - searchable -->
+        <activity android:name="Search"
+                  android:label="@string/search_action"
+                  android:launchMode="singleTop">
+            <intent-filter>
+                <action android:name="android.intent.action.SEARCH" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+            <meta-data android:name="android.app.searchable"
+                       android:resource="@xml/searchable" />
+        </activity>
         <receiver android:name="com.fsck.k9.service.BootReceiver"
               android:enabled="true"
               >

res/xml/searchable.xml

@@ -0,0 +1,4 @@
+ <searchable xmlns:android="http://schemas.android.com/apk/res/android"
+     android:label="@string/search_action"
+     android:hint="@string/search_action" >
+ </searchable>

src/com/fsck/k9/mail/store/LocalStore.java

@@ -1273,6 +1273,23 @@ public class LocalStore extends Store implements Serializable
 
         }
 
+        public Message[] searchForMessages(MessageRetrievalListener listener, String queryString) throws MessagingException {
+            return getMessages(
+                       listener,
+                       "SELECT "
+                       + GET_MESSAGES_COLS
+                       + "FROM messages WHERE html_content LIKE ? OR subject LIKE ? OR sender_list LIKE ? ORDER BY date DESC"
+                       , new String[]
+                       {
+                           queryString,
+                           queryString,
+                           queryString
+                       }
+                   );
+
+
+        }
+
         /*
          * Given a query string, actually do the query for the messages and
          * call the MessageRetrievalListener for each one