Fix broken documentation in telephony and telecomm

Due to a bug in the build system, broken @see/@link references have not
failed to build for a while, so many errors have accumulated.

This is an attempt to patch up the telephony and telecomm docs. The
most common errors and fixes were:
- @link-ing IntDef constants from javadoc. IntDefs are not present
  in the docs, so rewrite those to natural english, or point to the
  constant prefixes
- Javadoc for public symbols referencing SystemApi symbols. Change those
  to @code instead of @link

There were various other fixes too, and I'm not sure they're all
perfect, but certainly an improvement over the brokenness we have
currently.

Bug: 303184203
Test: m docs
Change-Id: I5cefc72074ced29c0b046cf59deb7ee371e74bf0
diff --git a/telecomm/java/android/telecom/Call.java b/telecomm/java/android/telecom/Call.java
index 7d9b379..a7675d6 100644
--- a/telecomm/java/android/telecom/Call.java
+++ b/telecomm/java/android/telecom/Call.java
@@ -1894,7 +1894,7 @@
      * Tones are both played locally for the user to hear and sent to the network to be relayed
      * to the remote device.
      * <p>
-     * You must ensure that any call to {@link #playDtmfTone(char}) is followed by a matching
+     * You must ensure that any call to {@link #playDtmfTone(char)} is followed by a matching
      * call to {@link #stopDtmfTone()} and that each tone is stopped before a new one is started.
      * The play and stop commands are relayed to the underlying
      * {@link android.telecom.ConnectionService} as executed; implementations may not correctly
diff --git a/telecomm/java/android/telecom/CallControl.java b/telecomm/java/android/telecom/CallControl.java
index 50f2ad4..24d3918 100644
--- a/telecomm/java/android/telecom/CallControl.java
+++ b/telecomm/java/android/telecom/CallControl.java
@@ -225,7 +225,7 @@
 
     /**
      * Request start a call streaming session. On receiving valid request, telecom will bind to
-     * the {@link CallStreamingService} implemented by a general call streaming sender. So that the
+     * the {@code CallStreamingService} implemented by a general call streaming sender. So that the
      * call streaming sender can perform streaming local device audio to another remote device and
      * control the call during streaming.
      *
diff --git a/telecomm/java/android/telecom/CallControlCallback.java b/telecomm/java/android/telecom/CallControlCallback.java
index eac2e64..0166022 100644
--- a/telecomm/java/android/telecom/CallControlCallback.java
+++ b/telecomm/java/android/telecom/CallControlCallback.java
@@ -69,7 +69,7 @@
     /**
      * Telecom is informing the client to answer an incoming call and set it to active.
      *
-     * @param videoState   see {@link android.telecom.CallAttributes.CallType} for valid states
+     * @param videoState   the video state
      * @param wasCompleted The {@link Consumer} to be completed. If the client can answer the call
      *                     on their end, {@link Consumer#accept(Object)} should be called with
      *                     {@link Boolean#TRUE}.
diff --git a/telecomm/java/android/telecom/PhoneAccountSuggestion.java b/telecomm/java/android/telecom/PhoneAccountSuggestion.java
index d9f89d5..c83804f 100644
--- a/telecomm/java/android/telecom/PhoneAccountSuggestion.java
+++ b/telecomm/java/android/telecom/PhoneAccountSuggestion.java
@@ -68,7 +68,7 @@
 
     /**
      * Creates a new instance of {@link PhoneAccountSuggestion}. This constructor is intended for
-     * use by apps implementing a {@link PhoneAccountSuggestionService}, and generally should not be
+     * use by apps implementing a {@code PhoneAccountSuggestionService}, and generally should not be
      * used by dialer apps other than for testing purposes.
      *
      * @param handle The {@link PhoneAccountHandle} for this suggestion.