Set apex_available property

The marked library(ies) were available to the APEXes via the hand-written
whitelist in build/soong/apex/apex.go. Trying to remove the whitelist
by adding apex_available property to the Android.bp of the libraries.

Exempt-From-Owner-Approval: cherry-pick from AOSP

Bug: 150999716
Test: m
Merged-In: I60e1ae6fa837772c2682d4a26ea34bd80e69bc9e
(cherry picked from commit 2d6d9ab848)
Change-Id: I60e1ae6fa837772c2682d4a26ea34bd80e69bc9e

Android.bp

@@ -57,6 +57,10 @@ cc_library_static {
     vendor_available: true,
     ramdisk_available: true,
     recovery_available: true,
+    apex_available: [
+        "//apex_available:platform",
+        "//apex_available:anyapex",
+    ],
     native_bridge_supported: true,
     srcs: [
         "src/algorithm.cpp",
@@ -114,6 +118,10 @@ cc_library_shared {
     },
     ramdisk_available: true,
     recovery_available: true,
+    apex_available: [
+        "//apex_available:platform",
+        "//apex_available:anyapex",
+    ],
     whole_static_libs: ["libc++_static"],
     stl: "none",