Reorder lock acquision vs try.

In two places involving locking, reordered the code so that the lock
acquisition is performed outside of the `try` block and everything
else that needs to run while the lock is locked *within* the `try`
block.

Change-Id: I3dad2c4bbf60b219fc6db2aa35e2ed296cb39128

Author: dtrebbien

core/java/android/database/sqlite/SQLiteCursor.java

@@ -131,11 +131,11 @@ public void run() {
             // the cursor's state doesn't change
             while (true) {
                 mLock.lock();
-                if (mCursorState != mThreadState) {
-                    mLock.unlock();
-                    break;
-                }
                 try {
+                    if (mCursorState != mThreadState) {
+                        break;
+                    }
+
                     int count = mQuery.fillWindow(cw, mMaxRead, mCount);
                     // return -1 means not finished
                     if (count != 0) {
@@ -217,9 +217,8 @@ public SQLiteCursor(SQLiteDatabase db, SQLiteCursorDriver driver,
         mColumnNameMap = null;
         mQuery = query;
 
+        db.lock();
         try {
-            db.lock();
-
             // Setup the list of columns
             int columnCount = mQuery.columnCountLocked();
             mColumns = new String[columnCount];