Commit after every full record insertion/update (closes #135)

Docs say that TransactionTooLargeException is thrown when the buffer reaches 1 MB. Because we can't know
how large a single insertion/update is and there may be contacts with larger photos, it's only safe to
commit after every insertion/update. If photos exceed ~ 900 kB it would be required to write the photos
to an asset file (maybe I'll do this later, then we can group insertions/updates again).

src/at/bitfire/davdroid/syncadapter/SyncManager.java

@@ -174,14 +174,11 @@ public class SyncManager {
 		Log.i(TAG, "Fetching " + resourcesToAdd.length + " new remote resource(s)");
 		
 		for (Resource[] resources : ArrayUtils.partition(resourcesToAdd, MAX_MULTIGET_RESOURCES))
-			try {
-				for (Resource res : remote.multiGet(resources)) {
-					Log.d(TAG, "Adding " + res.getName());
-					local.add(res);
-					count++;
-				}
-			} finally {
+			for (Resource res : remote.multiGet(resources)) {
+				Log.d(TAG, "Adding " + res.getName());
+				local.add(res);
 				local.commit();
+				count++;
 			}
 		return count;
 	}
@@ -191,14 +188,11 @@ public class SyncManager {
 		Log.i(TAG, "Fetching " + resourcesToUpdate.length + " updated remote resource(s)");
 		
 		for (Resource[] resources : ArrayUtils.partition(resourcesToUpdate, MAX_MULTIGET_RESOURCES))
-			try {
-				for (Resource res : remote.multiGet(resources)) {
-					Log.i(TAG, "Updating " + res.getName());
-					local.updateByRemoteName(res);
-					count++;
-				}
-			} finally {
+			for (Resource res : remote.multiGet(resources)) {
+				Log.i(TAG, "Updating " + res.getName());
+				local.updateByRemoteName(res);
 				local.commit();
+				count++;
 			}
 		return count;
 	}