Frameworks/base: Wall Werror in native/android

Turn on -Wall -Werror in native/android.

Change-Id: I28bab9ebd2fe3f6935878816773a04531e26450f
Fix memory leak where we close the descriptor instead of the file.

(cherry pick of 5cb769d99952ef9fb4f576abba70423fe157342b.)

bug: 17541634
Change-Id: I9968f9df249e4cba24383239ce6130dd16fcd532
Fixing NULL pointer access causing segmentation fault in aapt

In cases where resource packages are generated which does
not have public resources for all resource types - NULL
pointers sneaks into the mOrderedConfigs vector causing
the aapt tool to crash. The solution in this fix simply
ignores the NULL elements when later processing the sorted
vector.

The NULL elements are inserted during applyPublicEntryOrder
function call

Change-Id: I8b7135932e2d235018da2e2f7e09f0d22f1b2f59