Fix camera stress tests directory

Test: build apk locally and run,  test pass
Bug: 124237534
Change-Id: I077ccf55996f8fac568d3a617e2ffdbfccdf14aa
diff --git a/media/tests/MediaFrameworkTest/src/com/android/mediaframeworktest/helpers/CameraTestResultPrinter.java b/media/tests/MediaFrameworkTest/src/com/android/mediaframeworktest/helpers/CameraTestResultPrinter.java
index 2492109..ed2eebf 100644
--- a/media/tests/MediaFrameworkTest/src/com/android/mediaframeworktest/helpers/CameraTestResultPrinter.java
+++ b/media/tests/MediaFrameworkTest/src/com/android/mediaframeworktest/helpers/CameraTestResultPrinter.java
@@ -40,14 +40,14 @@
     private Instrumentation mInst = null;
     private boolean mWriteToFile = true;
 
-
     public CameraTestResultPrinter(Instrumentation instrumentation, boolean writeToFile) {
         mInst = instrumentation;
         mWriteToFile = writeToFile;
 
         // Create a log directory if not exists.
         File baseDir = new File(RESULT_DIR);
-        if (!baseDir.exists() && !baseDir.mkdirs()) {
+        baseDir.mkdirs();
+        if (!baseDir.isDirectory()) {
             throw new IllegalStateException("Couldn't create directory for logs: " + baseDir);
         }
         Log.v(TAG, String.format("Saving test results under: %s", baseDir.getAbsolutePath()));