Test a few more operations on a closed database

Author: Chris Brody

src/main/java/net/zetetic/tests/ClosedDatabaseTest.java

@@ -297,6 +297,10 @@ boolean execute_closed_database_tests(SQLiteDatabase database) {
             database.setLockingEnabled(false);
             database.setLockingEnabled(true);
 
+            database.inTransaction();
+            database.isDbLockedByCurrentThread();
+            database.isDbLockedByOtherThreads();
+
             database.close();
 
             database.isReadOnly();