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/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.
      *