Add WearSpeakerSample to sample build

Using new 'unmanaged' template to allow output to DAC, without
managing build directly.

Change-Id: I0027392113f8484c7ffb2d2f957ac133e0e81208
diff --git a/wearable/wear/WearSpeakerSample/build.gradle b/wearable/wear/WearSpeakerSample/build.gradle
index 374e72b..25ba12a 100644
--- a/wearable/wear/WearSpeakerSample/build.gradle
+++ b/wearable/wear/WearSpeakerSample/build.gradle
@@ -37,3 +37,14 @@
 task clean(type: Delete) {
     delete rootProject.buildDir
 }
+
+// BEGIN_EXCLUDE
+import com.example.android.samples.build.SampleGenPlugin
+apply plugin: SampleGenPlugin
+
+samplegen {
+  pathToBuild "../../../../../build"
+  pathToSamplesCommon "../../../common"
+}
+apply from: "../../../../../build/build.gradle"
+// END_EXCLUDE