IAdbManager.getPairDevices returns FingerprintAndPairDevice[].

Map is not supported in C++ backend. To compile IAdbManager in C++,
Map is translated into a list of key, value tuples.

Test: pass
Bug: 194829333
Change-Id: I92e3ad29e8a2bfbab3756d2ef5a2db76ba3cc3d9

core/java/android/debug/FingerprintAndPairDevice.aidl

@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2021 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.debug;
+
+import android.debug.PairDevice;
+
+/**
+ * @see {@link android.debug.IAdbManager#getPairedDevices()}
+ * @hide
+ */
+parcelable FingerprintAndPairDevice {
+    String keyFingerprint;
+    PairDevice device;
+}

core/java/android/debug/IAdbManager.aidl

@@ -16,6 +16,8 @@
 
 package android.debug;
 
+import android.debug.FingerprintAndPairDevice;
+
 /**
  * Interface to communicate remotely with the {@code AdbService} in the system server.
  *
@@ -58,9 +60,10 @@ interface IAdbManager {
     void denyWirelessDebugging();
 
     /**
-     * Returns a Map<String, PairDevice> with the key fingerprint mapped to the device information.
+     * Returns an array of NamedPairDevice with the key fingerprint mapped to the device
+     * information.
      */
-    Map getPairedDevices();
+    FingerprintAndPairDevice[] getPairedDevices();
 
     /**
      * Unpair the device identified by the key fingerprint it uses.

services/core/java/com/android/server/adb/AdbService.java

@@ -27,6 +27,7 @@ import android.database.ContentObserver;
 import android.debug.AdbManager;
 import android.debug.AdbManagerInternal;
 import android.debug.AdbTransportType;
+import android.debug.FingerprintAndPairDevice;
 import android.debug.IAdbManager;
 import android.debug.IAdbTransport;
 import android.debug.PairDevice;
@@ -348,12 +349,21 @@ public class AdbService extends IAdbManager.Stub {
     }
 
     @Override
-    public Map<String, PairDevice> getPairedDevices() {
+    public FingerprintAndPairDevice[] getPairedDevices() {
         mContext.enforceCallingOrSelfPermission(android.Manifest.permission.MANAGE_DEBUGGING, null);
-        if (mDebuggingManager != null) {
-            return mDebuggingManager.getPairedDevices();
+        if (mDebuggingManager == null) {
+            return null;
         }
-        return null;
+        Map<String, PairDevice> map = mDebuggingManager.getPairedDevices();
+        FingerprintAndPairDevice[] ret = new FingerprintAndPairDevice[map.size()];
+        int i = 0;
+        for (Map.Entry<String, PairDevice> entry : map.entrySet()) {
+            ret[i] = new FingerprintAndPairDevice();
+            ret[i].keyFingerprint = entry.getKey();
+            ret[i].device = entry.getValue();
+            i++;
+        }
+        return ret;
     }
 
     @Override