Set sdk_version for libmediabenchmark JNI libraries

MediaBenchmarkTest sets sdk_version: "system_current", but its
JNI libraries were building against platform APIs.

Bug: 149591057
Test: m checkbuild
Change-Id: I4a62812b8fb5b534bdb698d4138123eb1e4e3cfa
diff --git a/media/tests/benchmark/MediaBenchmarkTest/src/main/cpp/Android.bp b/media/tests/benchmark/MediaBenchmarkTest/src/main/cpp/Android.bp
index c72eb55..3e5e4c8 100644
--- a/media/tests/benchmark/MediaBenchmarkTest/src/main/cpp/Android.bp
+++ b/media/tests/benchmark/MediaBenchmarkTest/src/main/cpp/Android.bp
@@ -1,5 +1,6 @@
 cc_test_library {
     name: "libmediabenchmark_jni",
+    sdk_version: "current",
 
     defaults: [
         "libmediabenchmark_common-defaults",
diff --git a/media/tests/benchmark/src/native/common/Android.bp b/media/tests/benchmark/src/native/common/Android.bp
index f8ea25c..d4389da 100644
--- a/media/tests/benchmark/src/native/common/Android.bp
+++ b/media/tests/benchmark/src/native/common/Android.bp
@@ -46,6 +46,8 @@
 
 cc_defaults {
     name: "libmediabenchmark-defaults",
+    sdk_version: "current",
+    stl: "c++_shared",
 
     shared_libs: [
         "libmediandk",