Tweak IMapper 4.0 VTS to run with AIDL IAllocator

When there is no HIDL IAllocator installed on the device, then these
tests must still run.

Bug: 231982605
Test: VtsHalGraphicsMapperV4_0TargetTest
Change-Id: If7503d398c03086df470971cc2c10029270525f9
diff --git a/graphics/composer/2.4/utils/vts/Android.bp b/graphics/composer/2.4/utils/vts/Android.bp
index 5ef861c..de31975 100644
--- a/graphics/composer/2.4/utils/vts/Android.bp
+++ b/graphics/composer/2.4/utils/vts/Android.bp
@@ -32,6 +32,7 @@
         "TestCommandReader.cpp",
     ],
     static_libs: [
+        "android.hardware.graphics.allocator-V1-ndk",
         "android.hardware.graphics.composer@2.1",
         "android.hardware.graphics.composer@2.2",
         "android.hardware.graphics.composer@2.3-vts",