Add uses-sdk to Telecom test APK manifests

Allow them to be installed on master via adb install

Change-Id: I8c8df36eb04e2a904a5146e50cbb885c10145776
diff --git a/testapps/AndroidManifest.xml b/testapps/AndroidManifest.xml
index df333a5..0672b6d 100644
--- a/testapps/AndroidManifest.xml
+++ b/testapps/AndroidManifest.xml
@@ -18,6 +18,10 @@
           coreApp="true"
           package="com.android.server.telecom.testapps">
 
+    <uses-sdk
+        android:minSdkVersion="23"
+        android:targetSdkVersion="23" />
+
     <uses-permission android:name="android.permission.CAMERA" />
     <uses-permission android:name="android.permission.CALL_PHONE" />
     <uses-permission android:name="android.permission.CONTROL_INCALL_EXPERIENCE" />