Remove active_buffer_bit_mask_ from BufferNode.

BufferNode already have metadata which contains active_clients_bit_mask,
which serves the same purpose as active_buffer_bit_mask_ but also have
other usage. This change removes the redundant active_buffer_bit_mask_
from BufferNode.

Test: buffer_node-test on marlin-eng and vega_xr build
Bug: 112007999
Change-Id: I7695dc5d6eb84a4a5c73148e9636871cc7776df4
diff --git a/services/vr/bufferhubd/tests/Android.bp b/services/vr/bufferhubd/tests/Android.bp
index bf8ea5b..a80691f 100644
--- a/services/vr/bufferhubd/tests/Android.bp
+++ b/services/vr/bufferhubd/tests/Android.bp
@@ -23,4 +23,31 @@
 
     // TODO(b/117568153): Temporarily opt out using libcrt.
     no_libcrt: true,
-}
\ No newline at end of file
+}
+
+cc_test {
+    name: "buffer_node-test",
+    srcs: ["buffer_node-test.cpp"],
+    cflags: [
+        "-DLOG_TAG=\"buffer_node-test\"",
+        "-DTRACE=0",
+        "-DATRACE_TAG=ATRACE_TAG_GRAPHICS",
+    ],
+    header_libs: ["libdvr_headers"],
+    static_libs: [
+        "libbufferhub",
+        "libbufferhubd",
+        "libgmock",
+    ],
+    shared_libs: [
+        "libbase",
+        "libbinder",
+        "liblog",
+        "libpdx_default_transport",
+        "libui",
+        "libutils",
+    ],
+    // TODO(b/117568153): Temporarily opt out using libcrt.
+    no_libcrt: true,
+}
+