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
Change-Id: Ibd1927a18d4559f24d47562dc0cdc02f69ad0f61
diff --git a/Android.bp b/Android.bp
index 276d958..97420a3 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,6 +1,9 @@
 cc_library_shared {
     name: "libldacBT_enc",
     vendor_available: true,
+    vndk: {
+        enabled: true,
+    },
     arch: {
         arm: {
             instruction_set: "arm",
@@ -19,6 +22,9 @@
 cc_library_shared {
     name: "libldacBT_abr",
     vendor_available: true,
+    vndk: {
+        enabled: true,
+    },
     arch: {
         arm: {
             instruction_set: "arm",