Fix a crash during file deletion.

Fix an off-by-one error when checking deletion candidates, that was
causing item positions to be incorrectly bumped following a successful
deletion.

BUG=23823860

Change-Id: Id261ad49271fb0c1a5ff1cba88fea1451412d7f3
diff --git a/src/com/android/documentsui/DirectoryFragment.java b/src/com/android/documentsui/DirectoryFragment.java
index edf829d..253a4af 100644
--- a/src/com/android/documentsui/DirectoryFragment.java
+++ b/src/com/android/documentsui/DirectoryFragment.java
@@ -1824,7 +1824,7 @@
             // position by 1.
             final int originalPos = position;
             final int size = mMarkedForDeletion.size();
-            for (int i = 0; i <= size; ++i) {
+            for (int i = 0; i < size; ++i) {
                 // It'd be more concise, but less efficient, to iterate over positions while calling
                 // mMarkedForDeletion.get.  Instead, iterate over deleted entries.
                 if (mMarkedForDeletion.keyAt(i) <= position && mMarkedForDeletion.valueAt(i)) {