Restore broken CursorWindow.getType behavior.

Bug: 5430009

Some CTS tests try to call getType on fields in empty
cursor windows or with out of bound column indices (-1).
Restoring the previous behavior of returning FIELD_TYPE_NULL
instead of throwing.  Fix this later.

Change-Id: I782bd02012474e7dabc5bb7ea2dc45e8b0c7ef25

Author: Jeff Brown

core/jni/android_database_CursorWindow.cpp

@@ -147,8 +147,10 @@ static jint nativeGetType(JNIEnv* env, jclass clazz, jint windowPtr,
 
     field_slot_t* fieldSlot = window->getFieldSlotWithCheck(row, column);
     if (!fieldSlot) {
-        throwExceptionWithRowCol(env, row, column);
-        return NULL;
+        // FIXME: This is really broken but we have CTS tests that depend
+        // on this legacy behavior.
+        //throwExceptionWithRowCol(env, row, column);
+        return FIELD_TYPE_NULL;
     }
     return fieldSlot->type;
 }