Quick fix layout test path problems

SD card mount point has changed from /sdcard to /mnt/sdcard. layout test was calling getCanonicalPath to determine the path to the test case, which causes problem because /sdcard is now a symlink, and canonical path is actually the "real" path. Using quick dirty fix for now, will properly migrate any hard-coded reference to "/sdcard" to system function calls.
diff --git a/tests/DumpRenderTree/src/com/android/dumprendertree/LayoutTestsAutoTest.java b/tests/DumpRenderTree/src/com/android/dumprendertree/LayoutTestsAutoTest.java
index 8983612..634d683 100644
--- a/tests/DumpRenderTree/src/com/android/dumprendertree/LayoutTestsAutoTest.java
+++ b/tests/DumpRenderTree/src/com/android/dumprendertree/LayoutTestsAutoTest.java
@@ -339,14 +339,7 @@
         this.mTestList = new Vector<String>();
 
         // Read settings
-        try {
-            this.mTestPathPrefix =
-                (new File(LAYOUT_TESTS_ROOT + runner.mTestPath)).getCanonicalPath();
-        } catch (IOException e) {
-            Log.e(LOGTAG, "Cannot find test path prefix: " + e.getMessage());
-            return;
-        }
-
+        this.mTestPathPrefix = (new File(LAYOUT_TESTS_ROOT + runner.mTestPath)).getAbsolutePath();
         this.mRebaselineResults = runner.mRebaseline;
 
         int timeout = runner.mTimeoutInMillis;
@@ -395,11 +388,7 @@
         if (runner.mTestPath != null) {
             test_path += runner.mTestPath;
         }
-        try {
-            test_path = new File(test_path).getCanonicalPath();
-        } catch (IOException e) {
-            Log.e("LayoutTestsAutoTest", "Cannot get cannonical path " + e.getMessage());
-        }
+        test_path = new File(test_path).getAbsolutePath();
         Log.v("LayoutTestsAutoTest", " Test path : " + test_path);
 
         return test_path;