Messaging: Remove compatibility for old android versions

Change-Id: Id9065d60525a509271a0e64c0e349e857cb998e2

src/com/android/messaging/datamodel/BugleDatabaseOperations.java

@@ -45,7 +45,6 @@ import com.android.messaging.util.Assert.DoesNotRunOnMainThread;
 import com.android.messaging.util.AvatarUriUtil;
 import com.android.messaging.util.ContentType;
 import com.android.messaging.util.LogUtil;
-import com.android.messaging.util.OsUtil;
 import com.android.messaging.util.PhoneUtils;
 import com.android.messaging.util.UriUtil;
 import com.android.messaging.widget.WidgetConversationProvider;
@@ -567,7 +566,7 @@ public class BugleDatabaseOperations {
         // reading and if necessary creating the conversation.
         updateConversationRow(dbWrapper, conversationId, values);
 
-        if (shouldAutoSwitchSelfId && OsUtil.isAtLeastL_MR1()) {
+        if (shouldAutoSwitchSelfId) {
             // Normally, the draft message compose UI trusts its UI state for providing up-to-date
             // conversation self id. Therefore, notify UI through local broadcast receiver about
             // this external change so the change can be properly reflected.
@@ -624,7 +623,7 @@ public class BugleDatabaseOperations {
     static boolean addSelfIdAutoSwitchInfoToContentValues(final DatabaseWrapper dbWrapper,
             final MessageData message, final String conversationId, final ContentValues values) {
         // Only auto switch conversation self for incoming messages.
-        if (!OsUtil.isAtLeastL_MR1() || !message.getIsIncoming()) {
+        if (!message.getIsIncoming()) {
             return false;
         }