Add "CONNECTING" state for before outgoing call broadcast returns

Immediately add a call to Telecomm before the outgoing call broadcast
intent returns, this will reduce the latency for the InCallUI by
allowing the InCallActivity to start before Telecomm has responded.

Bug: 16396523
Change-Id: Iada2a6bdb803794a765b81edb2dfb0953445ae43

api/current.txt

@@ -28599,6 +28599,7 @@ package android.telecomm {
     method public void swapWithBackgroundCall();
     method public void unhold();
     field public static final int STATE_ACTIVE = 4; // 0x4
+    field public static final int STATE_CONNECTING = 9; // 0x9
     field public static final int STATE_DIALING = 1; // 0x1
     field public static final int STATE_DISCONNECTED = 7; // 0x7
     field public static final int STATE_HOLDING = 3; // 0x3
@@ -28691,6 +28692,7 @@ package android.telecomm {
     method public static android.telecomm.CallState valueOf(java.lang.String);
     method public static final android.telecomm.CallState[] values();
     enum_constant public static final android.telecomm.CallState ACTIVE;
+    enum_constant public static final android.telecomm.CallState CONNECTING;
     enum_constant public static final android.telecomm.CallState DIALING;
     enum_constant public static final android.telecomm.CallState DISCONNECTED;
     enum_constant public static final android.telecomm.CallState NEW;

telecomm/java/android/telecomm/Call.java

@@ -69,6 +69,11 @@ public final class Call {
      */
     public static final int STATE_PRE_DIAL_WAIT = 8;
 
+    /**
+     * The state of an outgoing {@code Call}, before Telecomm broadcast intent has returned.
+     */
+    public static final int STATE_CONNECTING = 9;
+
     public static class Details {
         private final Uri mHandle;
         private final int mHandlePresentation;
@@ -771,6 +776,8 @@ public final class Call {
         switch (parcelableCallState) {
             case NEW:
                 return STATE_NEW;
+            case CONNECTING:
+                return STATE_CONNECTING;
             case PRE_DIAL_WAIT:
                 return STATE_PRE_DIAL_WAIT;
             case DIALING:

telecomm/java/android/telecomm/CallState.java

@@ -31,6 +31,12 @@ public enum CallState {
      */
     NEW,
 
+    /**
+     * Indicates an outgoing call has been initiated and is waiting for the broadcast intent to
+     * return and provide call details before proceeding.
+     */
+    CONNECTING,
+
     /**
      * Indicates that the call is about to go into the outgoing and dialing state but is waiting for
      * user input before it proceeds. For example, where no default {@link PhoneAccount} is set,