Settings: Fix off-by-one SectionIndexer in PrivacyGuard.

Change-Id: If97876214d6f532ca4e5a09f09d881cd4fbf0231

Author: Adnan Begovic

src/com/android/settings/privacyguard/PrivacyGuardManager.java

@@ -252,11 +252,9 @@ private PrivacyGuardAppListAdapter createAdapter() {
             } else {
                 sectionIndex = app.title.substring(0, 1).toUpperCase();
             }
-            if (lastSectionIndex == null) {
-                lastSectionIndex = sectionIndex;
-            }
 
-            if (!TextUtils.equals(sectionIndex, lastSectionIndex)) {
+            if (lastSectionIndex == null ||
+                    !TextUtils.equals(sectionIndex, lastSectionIndex)) {
                 sections.add(sectionIndex);
                 positions.add(offset);
                 lastSectionIndex = sectionIndex;