Fix spell checker framework

Change-Id: I281d031259dd220936832668e7a4556473ccb2ce

Author: satok16

core/java/android/view/textservice/SpellCheckerSession.java

@@ -281,9 +281,6 @@ private void processTask(ISpellCheckerSession session, SpellCheckerParams scp,
                         if (DBG) {
                             Log.w(TAG, "Get suggestions from the spell checker.");
                         }
-                        if (scp.mTextInfos.length != 1) {
-                            throw new IllegalArgumentException();
-                        }
                         try {
                             session.onGetSentenceSuggestionsMultiple(
                                     scp.mTextInfos, scp.mSuggestionsLimit);

core/java/android/widget/SpellChecker.java

@@ -491,8 +491,8 @@ public void parse() {
                 wordStart = regionEnd;
                 // TODO: Find the start position of the sentence.
                 // Set span with the context
-                final int spellCheckStart =  Math.min(
-                        start, Math.max(wordStart, regionEnd - WORD_ITERATOR_INTERVAL));
+                final int spellCheckStart =  Math.max(
+                        0, Math.min(wordStart, regionEnd - WORD_ITERATOR_INTERVAL));
                 if (regionEnd <= spellCheckStart) {
                     return;
                 }