Revert "Refactor ProximityUpdateCallbackInternal to interface"

Revert submission 17936037-hotword_proximity

Reason for revert: https://buganizer.corp.google.com/issues/242223069
Reverted Changes:
If8c23a9c6:Refactor ProximityUpdateCallbackInternal to interf...
Ib0ad1da25:Verify that proximity key is added to the hotword ...
I71e9d3da9:Add proximity state to the HotwordDetectedResult

Change-Id: Ibfc65901547d74d6fcfafc257653f49a17a98662

core/java/android/attention/AttentionManagerInternal.java

@@ -83,11 +83,11 @@ public abstract class AttentionManagerInternal {
     }
 
     /** Internal interface for proximity callback. */
-    public interface ProximityUpdateCallbackInternal {
+    public abstract static class ProximityUpdateCallbackInternal {
         /**
          * @param distance the estimated distance of the user (in meter)
          * The distance will be PROXIMITY_UNKNOWN if the proximity sensing was inconclusive.
          */
-        void onProximityUpdate(double distance);
+        public abstract void onProximityUpdate(double distance);
     }
 }

services/core/java/com/android/server/attention/AttentionManagerService.java

@@ -856,6 +856,9 @@ public class AttentionManagerService extends SystemService {
     @GuardedBy("mLock")
     private void cancelAndUnbindLocked() {
         synchronized (mLock) {
+            if (mCurrentAttentionCheck == null && mCurrentProximityUpdate == null) {
+                return;
+            }
             if (mCurrentAttentionCheck != null) {
                 cancel();
             }
@@ -937,7 +940,7 @@ public class AttentionManagerService extends SystemService {
             }
         }
 
-        class TestableProximityUpdateCallbackInternal implements ProximityUpdateCallbackInternal {
+        class TestableProximityUpdateCallbackInternal extends ProximityUpdateCallbackInternal {
             private double mLastCallbackCode = PROXIMITY_UNKNOWN;
 
             @Override
@@ -1069,7 +1072,6 @@ public class AttentionManagerService extends SystemService {
         private void resetStates() {
             synchronized (mLock) {
                 mCurrentProximityUpdate = null;
-                cancelAndUnbindLocked();
             }
             mComponentName = resolveAttentionService(mContext);
         }

services/voiceinteraction/java/com/android/server/voiceinteraction/HotwordDetectionConnection.java

@@ -192,7 +192,14 @@ final class HotwordDetectionConnection {
     final AttentionManagerInternal mAttentionManagerInternal;
 
     final AttentionManagerInternal.ProximityUpdateCallbackInternal mProximityCallbackInternal =
-            this::setProximityMeters;
+            new AttentionManagerInternal.ProximityUpdateCallbackInternal() {
+        @Override
+        public void onProximityUpdate(double distance) {
+            synchronized (mLock) {
+                mProximityMeters = distance;
+            }
+        }
+    };
 
 
     volatile HotwordDetectionServiceIdentity mIdentity;
@@ -1183,12 +1190,6 @@ final class HotwordDetectionConnection {
         }
     }
 
-    private void setProximityMeters(double proximityMeters) {
-        synchronized (mLock) {
-            mProximityMeters = proximityMeters;
-        }
-    }
-
     private static void bestEffortClose(Closeable... closeables) {
         for (Closeable closeable : closeables) {
             bestEffortClose(closeable);