Atom: CallStateChanged

Adds CallStateChanged atom, including the state and disconnect cause
(when the state is disconnected). Makes the constants in CallState.java
(in packages/services) and DisconnectCause.java reference the proto
enum.

Test: atest TelecomUnitTests, verified events were received in adb logcat -b stats
Change-Id: I5c4d91387259fc7349e17551962cb490f5ed9f36
diff --git a/cmds/statsd/src/atoms.proto b/cmds/statsd/src/atoms.proto
index 6bca16f..4c6a36b 100644
--- a/cmds/statsd/src/atoms.proto
+++ b/cmds/statsd/src/atoms.proto
@@ -24,6 +24,7 @@
 import "frameworks/base/core/proto/android/app/enums.proto";
 import "frameworks/base/core/proto/android/os/enums.proto";
 import "frameworks/base/core/proto/android/server/enums.proto";
+import "frameworks/base/core/proto/android/telecomm/enums.proto";
 import "frameworks/base/core/proto/android/telephony/enums.proto";
 import "frameworks/base/core/proto/android/view/enums.proto";
 
@@ -98,6 +99,7 @@
         DaveyOccurred davey_occurred = 58;
         OverlayStateChanged overlay_state_changed = 59;
         ForegroundServiceStateChanged foreground_service_state_changed = 60;
+        CallStateChanged call_state_changed = 61;
         // TODO: Reorder the numbering so that the most frequent occur events occur in the first 15.
     }
 
@@ -725,6 +727,33 @@
     optional int64 time_since_last_boot = 6;
 }
 
+
+/**
+ * Logs call state and disconnect cause (if applicable).
+ *
+ * Logged from:
+ *   packages/services/Telecomm/src/com/android/server/telecom/Call.java
+ */
+message CallStateChanged {
+    // The state of the call. Eg. DIALING, ACTIVE, ON_HOLD, DISCONNECTED.
+    // From frameworks/base/core/proto/android/telecomm/enums.proto.
+    optional android.telecom.CallStateEnum call_state = 1;
+
+    // The reason the call disconnected. Eg. ERROR, MISSED, REJECTED, BUSY.
+    // This value is only applicable when the call_state is DISCONNECTED, and
+    // should always be UNKNOWN if the call_state is not DISCONNECTED.
+    // From frameworks/base/core/proto/android/telecomm/enums.proto.
+    optional android.telecom.DisconnectCauseEnum disconnect_cause = 2;
+
+    // True if the call is self-managed, which are apps that use the
+    // telecom infrastructure to make their own calls.
+    optional bool self_managed = 3;
+
+    // True if call is external. External calls are calls on connected Wear
+    // devices but show up in Telecom so the user can pull them onto the device.
+    optional bool external_call = 4;
+}
+
 /**
  * Logs the duration of a davey (jank of >=700ms) when it occurs
  *
diff --git a/core/proto/android/telecomm/enums.proto b/core/proto/android/telecomm/enums.proto
new file mode 100644
index 0000000..7a2ba62
--- /dev/null
+++ b/core/proto/android/telecomm/enums.proto
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2018 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.
+ */
+
+syntax = "proto2";
+package android.telecom;
+
+option java_outer_classname = "TelecomProtoEnums";
+option java_multiple_files = true;
+
+/**
+ * Call states, primarily used in CallState.java,
+ * Call.java, and CallsManager.java in packages/services.
+ */
+enum CallStateEnum {
+    /**
+     * Indicates that a call is new and not connected. This is used as the default state internally
+     * within Telecom and should not be used between Telecom and call services. Call services are
+     * not expected to ever interact with NEW calls, but {@link android.telecom.InCallService}s will
+     * see calls in this state.
+     */
+    NEW = 0;
+
+    /**
+     * The initial state of an outgoing {@code Call}.
+     * Common transitions are to {@link #DIALING} state for a successful call or
+     * {@link #DISCONNECTED} if it failed.
+     */
+    CONNECTING = 1;
+
+    /**
+     * The state of an outgoing {@code Call} when waiting on user to select a
+     * {@link android.telecom.PhoneAccount} through which to place the call.
+     */
+    SELECT_PHONE_ACCOUNT = 2;
+
+    /**
+     * Indicates that a call is outgoing and in the dialing state. A call transitions to this state
+     * once an outgoing call has begun (e.g., user presses the dial button in Dialer). Calls in this
+     * state usually transition to {@link #ACTIVE} if the call was answered or {@link #DISCONNECTED}
+     * if the call was disconnected somehow (e.g., failure or cancellation of the call by the user).
+     */
+    DIALING = 3;
+
+    /**
+     * Indicates that a call is incoming and the user still has the option of answering, rejecting,
+     * or doing nothing with the call. This state is usually associated with some type of audible
+     * ringtone. Normal transitions are to {@link #ACTIVE} if answered or {@link #DISCONNECTED}
+     * otherwise.
+     */
+    RINGING = 4;
+
+    /**
+     * Indicates that a call is currently connected to another party and a communication channel is
+     * open between them. The normal transition to this state is by the user answering a
+     * {@link #DIALING} call or a {@link #RINGING} call being answered by the other party.
+     */
+    ACTIVE = 5;
+
+    /**
+     * Indicates that the call is currently on hold. In this state, the call is not terminated
+     * but no communication is allowed until the call is no longer on hold. The typical transition
+     * to this state is by the user putting an {@link #ACTIVE} call on hold by explicitly performing
+     * an action, such as clicking the hold button.
+     */
+    ON_HOLD = 6;
+
+    /**
+     * Indicates that a call is currently disconnected. All states can transition to this state
+     * by the call service giving notice that the connection has been severed. When the user
+     * explicitly ends a call, it will not transition to this state until the call service confirms
+     * the disconnection or communication was lost to the call service currently responsible for
+     * this call (e.g., call service crashes).
+     */
+    DISCONNECTED = 7;
+
+    /**
+     * Indicates that the call was attempted (mostly in the context of outgoing, at least at the
+     * time of writing) but cancelled before it was successfully connected.
+     */
+    ABORTED = 8;
+
+    /**
+     * Indicates that the call is in the process of being disconnected and will transition next
+     * to a {@link #DISCONNECTED} state.
+     * <p>
+     * This state is not expected to be communicated from the Telephony layer, but will be reported
+     * to the InCall UI for calls where disconnection has been initiated by the user but the
+     * ConnectionService has confirmed the call as disconnected.
+     */
+    DISCONNECTING = 9;
+
+    /**
+     * Indicates that the call is in the process of being pulled to the local device.
+     * <p>
+     * This state should only be set on a call with
+     * {@link android.telecom.Connection#PROPERTY_IS_EXTERNAL_CALL} and
+     * {@link android.telecom.Connection#CAPABILITY_CAN_PULL_CALL}.
+     */
+    PULLING = 10;
+}
+
+// Disconnect causes for a call. Primarily used by android/telecom/DisconnectCause.java
+enum DisconnectCauseEnum {
+    /**
+     * Disconnected because of an unknown or unspecified reason.
+     */
+    UNKNOWN = 0;
+
+    /**
+     * Disconnected because there was an error, such as a problem with the network.
+     */
+    ERROR = 1;
+
+    /**
+     * Disconnected because of a local user-initiated action, such as hanging up.
+     */
+    LOCAL = 2;
+
+    /**
+     * Disconnected because of a remote user-initiated action, such as the other party hanging up
+     * up.
+     */
+    REMOTE = 3;
+
+    /**
+     * Disconnected because it has been canceled.
+     */
+    CANCELED = 4;
+
+    /**
+     * Disconnected because there was no response to an incoming call.
+     */
+    MISSED = 5;
+
+    /**
+     * Disconnected because the user rejected an incoming call.
+     */
+    REJECTED = 6;
+
+    /**
+     * Disconnected because the other party was busy.
+     */
+    BUSY = 7;
+
+    /**
+     * Disconnected because of a restriction on placing the call, such as dialing in airplane
+     * mode.
+     */
+    RESTRICTED = 8;
+
+    /**
+     * Disconnected for reason not described by other disconnect codes.
+     */
+    OTHER = 9;
+
+    /**
+     * Disconnected because the connection manager did not support the call. The call will be tried
+     * again without a connection manager. See {@link PhoneAccount#CAPABILITY_CONNECTION_MANAGER}.
+     */
+    CONNECTION_MANAGER_NOT_SUPPORTED = 10;
+
+    /**
+     * Disconnected because the user did not locally answer the incoming call, but it was answered
+     * on another device where the call was ringing.
+     */
+    ANSWERED_ELSEWHERE = 11;
+
+    /**
+     * Disconnected because the call was pulled from the current device to another device.
+     */
+    CALL_PULLED = 12;
+}
diff --git a/telecomm/java/android/telecom/DisconnectCause.java b/telecomm/java/android/telecom/DisconnectCause.java
index dcf5c27..1de67a5 100644
--- a/telecomm/java/android/telecom/DisconnectCause.java
+++ b/telecomm/java/android/telecom/DisconnectCause.java
@@ -33,47 +33,48 @@
 public final class DisconnectCause implements Parcelable {
 
     /** Disconnected because of an unknown or unspecified reason. */
-    public static final int UNKNOWN = 0;
+    public static final int UNKNOWN = TelecomProtoEnums.UNKNOWN; // = 0
     /** Disconnected because there was an error, such as a problem with the network. */
-    public static final int ERROR = 1;
+    public static final int ERROR = TelecomProtoEnums.ERROR; // = 1
     /** Disconnected because of a local user-initiated action, such as hanging up. */
-    public static final int LOCAL = 2;
+    public static final int LOCAL = TelecomProtoEnums.LOCAL; // = 2
     /**
      * Disconnected because of a remote user-initiated action, such as the other party hanging up
      * up.
      */
-    public static final int REMOTE = 3;
+    public static final int REMOTE = TelecomProtoEnums.REMOTE; // = 3
     /** Disconnected because it has been canceled. */
-    public static final int CANCELED = 4;
+    public static final int CANCELED = TelecomProtoEnums.CANCELED; // = 4
     /** Disconnected because there was no response to an incoming call. */
-    public static final int MISSED = 5;
+    public static final int MISSED = TelecomProtoEnums.MISSED; // = 5
     /** Disconnected because the user rejected an incoming call. */
-    public static final int REJECTED = 6;
+    public static final int REJECTED = TelecomProtoEnums.REJECTED; // = 6
     /** Disconnected because the other party was busy. */
-    public static final int BUSY = 7;
+    public static final int BUSY = TelecomProtoEnums.BUSY; // = 7
     /**
      * Disconnected because of a restriction on placing the call, such as dialing in airplane
      * mode.
      */
-    public static final int RESTRICTED = 8;
+    public static final int RESTRICTED = TelecomProtoEnums.RESTRICTED; // = 8
     /** Disconnected for reason not described by other disconnect codes. */
-    public static final int OTHER = 9;
+    public static final int OTHER = TelecomProtoEnums.OTHER; // = 9
     /**
      * Disconnected because the connection manager did not support the call. The call will be tried
      * again without a connection manager. See {@link PhoneAccount#CAPABILITY_CONNECTION_MANAGER}.
      */
-    public static final int CONNECTION_MANAGER_NOT_SUPPORTED = 10;
+    public static final int CONNECTION_MANAGER_NOT_SUPPORTED =
+            TelecomProtoEnums.CONNECTION_MANAGER_NOT_SUPPORTED; // = 10
 
     /**
      * Disconnected because the user did not locally answer the incoming call, but it was answered
      * on another device where the call was ringing.
      */
-    public static final int ANSWERED_ELSEWHERE = 11;
+    public static final int ANSWERED_ELSEWHERE = TelecomProtoEnums.ANSWERED_ELSEWHERE; // = 11
 
     /**
      * Disconnected because the call was pulled from the current device to another device.
      */
-    public static final int CALL_PULLED = 12;
+    public static final int CALL_PULLED = TelecomProtoEnums.CALL_PULLED; // = 12
 
     /**
      * Reason code (returned via {@link #getReason()}) which indicates that a call could not be