libziparchive headers are moved to local directory

libziparchive headers are moved from the global include directory
(/system/core/include) to the local directory inside libziparchive.

Note: /system/core/include/ziparchive still exists as a symlink to
libarchive/include/ziparchive. This will be removed when there is no
header-only dependency to libziparchive.

Bug: 37342627
Test: build
Change-Id: I3631ffc2df7be8a064d64a625d10436090c3bb0f

include/ziparchive

@@ -0,0 +1 @@
+../libziparchive/include/ziparchive

libziparchive/Android.bp

@@ -65,6 +65,7 @@ cc_library {
         "liblog",
         "libbase",
     ],
+    export_include_dirs: ["include"],
     target: {
         android: {
             shared_libs: [