Try to avoid possible NPE

For some reason .getParent() appears to be returning null for a data
directory. We don't need to use the parent; we can just use the path.

Bug: 7151733
Change-Id: I5e17cc14fe53669882329d67d8a7b4ec35b81104

Author: kruton

services/java/com/android/server/pm/PackageManagerService.java

@@ -4108,7 +4108,7 @@ private PackageParser.Package scanPackageLI(PackageParser.Package pkg,
                     }
                 } else if (!isForwardLocked(pkg) && !isExternal(pkg)) {
                     // Update native library dir if it starts with /data/data
-                    if (nativeLibraryDir.getParent().startsWith(dataPathString)) {
+                    if (nativeLibraryDir.getPath().startsWith(dataPathString)) {
                         setInternalAppNativeLibraryPath(pkg, pkgSetting);
                         nativeLibraryDir = new File(pkg.applicationInfo.nativeLibraryDir);
                     }