Implement remaining core eUICC APIs.

Includes:

-getDefaultDownloadableSubscriptionList, which returns a list of
default subscriptions available for the device.
-getEuiccInfo, which returns an EuiccInfo object containing
non-sensitive information about the eUICC device.
-deleteSubscription, to delete a subscription.
-switchToSubscription, to switch to (or away from) a subscription.
-updateSubscriptionNickname, to update the nickname of a subscription
which is saved to the eUICC.
-eraseSubscriptions, to factory reset the eUICC.
-Settings.Global#DEFAULT_SM_DP_PLUS, a default SM-DP+ server which is
used to query for default subscriptions in
getDefaultDownloadableSubscriptionList.

These APIs follow the template of the APIs which have already been
implemented.

This completes the baseline implementation as designed; any additional
APIs or tweaks to the APIs will be tracked as separate bugs.

Fixes: 33075886
Test: Build/boot
Change-Id: I8057757c874f94e0c816af1ca071d656c8f145b9
diff --git a/core/java/android/service/euicc/IEraseSubscriptionsCallback.aidl b/core/java/android/service/euicc/IEraseSubscriptionsCallback.aidl
new file mode 100644
index 0000000..aa70e76
--- /dev/null
+++ b/core/java/android/service/euicc/IEraseSubscriptionsCallback.aidl
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.service.euicc;
+
+import android.service.euicc.EraseResult;
+
+/** @hide */
+oneway interface IEraseSubscriptionsCallback {
+    void onComplete(in EraseResult result);
+}
\ No newline at end of file