Mark the module as VNDK or VNDK-SP in Android.bp

As a VNDK/VNDK-SP module, Android.bp must have 'vndk' tag as well
as 'vendor_available: true'.

For a VNDK module, the 'vndk' tag has 'enabled: true'.
It will be installed system/lib(64)/vndk as a vendor variant.

For a VNDK-SP module, the 'vndk' tag has
'support_system_process: true' as well as 'enabled: true'.
It will be installed system/lib(64)/vndk-sp as a vendor variant.

Bug: 63866913
Test: build and boot with BOARD_VNDK_VERSION=current
Merged-In: I86ba233b79ad3b9e6add84188bd49a6ab21ca9d4
Change-Id: I86ba233b79ad3b9e6add84188bd49a6ab21ca9d4
(cherry picked from commit 56ab53a0e3c02d1fb5764c72ecbe93e1601b2dbf)
diff --git a/Android.bp b/Android.bp
index c3bffad..15c9219 100644
--- a/Android.bp
+++ b/Android.bp
@@ -50,6 +50,9 @@
     defaults: ["pcre_defaults"],
     host_supported: true,
     vendor_available: true,
+    vndk: {
+        enabled: true,
+    },
     srcs: libpcre2_src_files,
     target: {
         linux_bionic: {