Revert "PackageInfo class incorrectly referenced as a struct."

This reverts commit b9b5d8c32e738d3607eec61e5d5bd95ca1521c2e.
Fixes for clang:
PackageInfo is a class, not a struct.
String16 is contained in the android namespace. Do not namespace prefix it
within the android namespace.
Explicitly specify which std classes are necessary to prevent ambiguous
type errors. (map, set)

Change-Id: I0d01477a976e770821ebae8847f8d11b132a15d6
Avoid adding FORWARD_LOCK flag to an updated system app

Consider the following case:
1. An app exists in /system/app or /vendor/app. (i.e, it's a system app)
2. If the app would be updated as a forward-lock app by downloading from
   market(google play), then it would be installed in /data/app-private.
3. Moreover, if it would be updated by the whole system image (i.e, FOTA
   or something like that), then the app would be applied a FORWARD_LOCK
   flag.

The app SHOULD NOT have a FORWARD_LCOK flag. Because the resource path
of such app does not refer to the proper resources to access.

Change-Id: I0750f69a93a3115f4201029796b598507de3555f
The order of child windows is switched

By calling WindowManagerService#reAddWindowLocked(), the window object
in DisplayContent.mWindows is rearranged. If this window has children,
the window objects belonging to WindowState.mChildWindows are also
rearranged together. At this time, while DisplayContent.mWindows is
arranged in ascending order of Z-Order, WindowState.mChildWindows is
arranged in descending order. Therefore, if children
(= WindowState.mChildWindows) are added to DisplayContent.mWindows
in the original order, the order of children is switched. I think
that children must be sorted before they are added.

Change-Id: I28a506f17fcd99c801a3faa17cca66fffb291596
FastScroller: Fix to use appropriate index

Fix FastScroller to use appropriate index to determine the
the position of a section while calculating the y coordinates
of thumb. In case of last section, use totalItemCount to determine
next section position.

Change-Id: I89bfd483949b5c14f85303b50380a73b4a4e635e
Fix typo in AlertController.java

If whichButtons is BIT_BUTTON_NEGATIVE, the negative button should be centered.

Change-Id: Ia34daf8c80704204a4f1cf71c642114005559d5d
Signed-off-by: Sangkyu Lee <sk82.lee@lge.com>
Fix misspelling of getLteSignalStrenght.

Change to getLteSignalStrength.

Change-Id: Ie2acec9e01af0e64a61902383f06729a7cee1975