DO NOT MERGE Apply a maximum char count to the load label api

The system is overwhelmed by an enormous label string returned by
the load label api. This cl truncates the label string if it exceeds
the maximum safe length.

Bug: 67013844
Test: atest PackageManagerTest
Change-Id: Ia4d768cc93a47cfb8b6f7c4b6dc73abd801809bd
Merged-in: Ia4d768cc93a47cfb8b6f7c4b6dc73abd801809bd
(cherry picked from commit 3c26a24644feaf2860892809929dec816f354bae)

Author: Rhed Jao

core/java/android/content/pm/PackageItemInfo.java

@@ -207,7 +207,9 @@ public PackageItemInfo(PackageItemInfo orig) {
             return loadSafeLabel(pm, DEFAULT_MAX_LABEL_SIZE_PX, SAFE_STRING_FLAG_TRIM
                     | SAFE_STRING_FLAG_FIRST_LINE);
         } else {
-            return loadUnsafeLabel(pm);
+            // Trims the label string to the MAX_SAFE_LABEL_LENGTH. This is to prevent that the
+            // system is overwhelmed by an enormous string returned by the application.
+            return TextUtils.trimToSize(loadUnsafeLabel(pm), MAX_SAFE_LABEL_LENGTH);
         }
     }