cmsdk: Mandate partner feature xml's for service implementation.

The feature xml plays two roles:

      1) To allow sdk interface (constructor) to throw when system
      service is unavailable. This allows for clearer platform
      development debugging.

      2) To allow for simpler disambiguation of what services to
      instrument in a modular environment.

Change-Id: Ic980225df9c115e97f7147cf043cf92bbb225f01
TICKET: CYNGNOS-2293

cm/lib/main/java/org/cyanogenmod/platform/internal/PartnerInterfaceService.java

@@ -60,7 +60,13 @@ public class PartnerInterfaceService extends SystemService {
     public PartnerInterfaceService(Context context) {
         super(context);
         mContext = context;
-        publishBinderService(CMContextConstants.CM_PARTNER_INTERFACE, mService);
+        if (mContext.getPackageManager().hasSystemFeature(
+                CMContextConstants.Features.PERFORMANCE)) {
+            publishBinderService(CMContextConstants.CM_PARTNER_INTERFACE, mService);
+        } else {
+            Log.wtf(TAG, "CM partner service started by system server but feature xml not" +
+                    " declared. Not publishing binder service!");
+        }
     }
 
     @Override

src/java/cyanogenmod/app/CMContextConstants.java

@@ -173,5 +173,13 @@ public final class CMContextConstants {
          */
         @SdkConstant(SdkConstant.SdkConstantType.FEATURE)
         public static final String PERFORMANCE = "org.cyanogenmod.performance";
+
+        /**
+         * Feature for {@link PackageManager#getSystemAvailableFeatures} and
+         * {@link PackageManager#hasSystemFeature}: The device includes the cm partner service
+         * utilized by the cmsdk.
+         */
+        @SdkConstant(SdkConstant.SdkConstantType.FEATURE)
+        public static final String PARTNER = "org.cyanogenmod.partner";
     }
 }

src/java/cyanogenmod/app/PartnerInterface.java

@@ -83,6 +83,12 @@ public class PartnerInterface {
             mContext = context;
         }
         sService = getService();
+        if (context.getPackageManager().hasSystemFeature(
+               CMContextConstants.Features.PARTNER) && sService == null) {
+            throw new RuntimeException("Unable to get PartnerInterfaceService. The service" +
+                    " either crashed, was not started, or the interface has been called to early" +
+                    " in SystemServer init");
+        }
     }
 
     /**

tests/src/org/cyanogenmod/tests/settings/unit/CMPartnerInterfaceTest.java

@@ -29,6 +29,8 @@ import android.test.suitebuilder.annotation.SmallTest;
 import android.provider.Settings;
 import android.text.format.DateUtils;
 import android.util.Log;
+
+import cyanogenmod.app.CMContextConstants;
 import cyanogenmod.app.PartnerInterface;
 
 import java.util.List;
@@ -45,6 +47,9 @@ public class CMPartnerInterfaceTest extends AndroidTestCase {
     @Override
     protected void setUp() throws Exception {
         super.setUp();
+        // Only run this if we support partner interfaces
+        org.junit.Assume.assumeTrue(mContext.getPackageManager().hasSystemFeature(
+                CMContextConstants.Features.PARTNER));
         mPartnerInterface = PartnerInterface.getInstance(getContext());
 
         setupAirplaneModeTests();