Show predictions in the right cases (A58)

After reverting an auto-correct we always have a separator after
the previously inserted word, and the cursor is never touching
a word. Showing predictions is the right thing to do, while
calling postUpdateSuggestions will invariably yield an invariably
blank suggestion strip, which is not very helpful.

Likewise, after we pick a suggestion, we should be showing the
predictions unless showing the addToDictionary hint. There was
a bug here in the corner case that the word would be a candidate
for user dictionary, but the user dictionary provider is not
available: in this case we should be showing predictions, but
we were showing an unhelpful empty suggestion bar.

Change-Id: I287bb5eb4af762bd5a433e85e185fab6d203e91a

java/src/com/android/inputmethod/latin/LatinIME.java

@@ -1874,7 +1874,8 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
                 mSuggestionsView.showAddToDictionaryHint(
                         suggestion, mCurrentSettings.mHintToSaveText);
             } else {
-                mHandler.postUpdateSuggestions();
+                // Here we just manually picked a suggestion. We should be showing the predictions!
+                mHandler.postUpdateBigramPredictions();
             }
         }
     }
@@ -2011,7 +2012,8 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
         // Don't restart suggestion yet. We'll restart if the user deletes the
         // separator.
         mLastComposedWord = LastComposedWord.NOT_A_COMPOSED_WORD;
-        mHandler.postUpdateSuggestions();
+        // We have a separator between the word and the cursor: we should show predictions.
+        mHandler.postUpdateBigramPredictions();
     }
 
     public boolean isWordSeparator(int code) {