Remove not necessary constructor of CallEndpointException

Some constructor in CallEndpointException are removed because the server side has no scenario to use.
CallEndpointException was introduced together with b/262452554 and it is used to report exceptions that can be occurred during change of CallEndpoint. But some constructor are not necessary because we can create it like CallEndpointController#getErrorResult.

bug: 264468307
Test: build and manual test
Change-Id: I24bc13b17d97c79f6c3b8fdce46ea7ac55c90f21

core/api/current.txt

@@ -41476,9 +41476,7 @@ package android.telecom {
   }
 
   public final class CallEndpointException extends java.lang.RuntimeException implements android.os.Parcelable {
-    ctor public CallEndpointException(@Nullable String);
     ctor public CallEndpointException(@Nullable String, int);
-    ctor public CallEndpointException(@Nullable String, int, @Nullable Throwable);
     method public int describeContents();
     method public int getCode();
     method public void writeToParcel(@NonNull android.os.Parcel, int);

telecomm/java/android/telecom/CallEndpointException.java

@@ -92,25 +92,12 @@ public final class CallEndpointException extends RuntimeException implements Par
     public @interface CallEndpointErrorCode {
     }
 
-    public CallEndpointException(@Nullable String message) {
-        super(getMessage(message, ERROR_UNSPECIFIED));
-        mMessage = message;
-    }
-
     public CallEndpointException(@Nullable String message, @CallEndpointErrorCode int code) {
         super(getMessage(message, code));
         mCode = code;
         mMessage = message;
     }
 
-    public CallEndpointException(@Nullable String message, @CallEndpointErrorCode int code,
-            @Nullable Throwable cause) {
-        super(getMessage(message, code), cause);
-        mCode = code;
-        mMessage = message;
-    }
-
-
     public @CallEndpointErrorCode int getCode() {
         return mCode;
     }