Run android interop test on a physical device

src/android/test/interop/app/build.gradle

@@ -29,7 +29,6 @@ android {
                 arguments '-DgRPC_CPP_PLUGIN_EXECUTABLE=' + grpc_cpp_plugin
             }
         }
-        ndk.abiFilters 'x86'
     }
     buildTypes {
         debug {

tools/internal_ci/linux/grpc_android.sh

@@ -44,7 +44,8 @@ gcloud firebase test android run \
     --device model=Nexus6P,version=24,locale=en,orientation=portrait \
     --device model=Nexus6P,version=23,locale=en,orientation=portrait \
     --device model=Nexus6,version=22,locale=en,orientation=portrait \
-    --device model=Nexus6,version=21,locale=en,orientation=portrait
+    --device model=Nexus6,version=21,locale=en,orientation=portrait \
+    --device model=walleye,version=28,locale=en,orientation=portrait
 
 
 # Build hello world example