api: add has_video attribute to incoming call events

This allows UI to show if incoming call is a video or audio call
and disable camera by default for audio calls.

Cargo.lock

@@ -1356,6 +1356,7 @@ dependencies = [
  "rustls",
  "rustls-pki-types",
  "sanitize-filename",
+ "sdp",
  "serde",
  "serde_json",
  "serde_urlencoded",
@@ -5266,6 +5267,18 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
+[[package]]
+name = "sdp"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4cd277015eada44a0bb810a4b84d3bf6e810573fa62fb442f457edf6a1087a69"
+dependencies = [
+ "rand 0.8.5",
+ "substring",
+ "thiserror 1.0.69",
+ "url",
+]
+
 [[package]]
 name = "sec1"
 version = "0.7.3"
@@ -5763,6 +5776,15 @@ dependencies = [
  "rand 0.9.0",
 ]
 
+[[package]]
+name = "substring"
+version = "1.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42ee6433ecef213b2e72f587ef64a2f5943e7cd16fbd82dbe8bc07486c534c86"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "subtle"
 version = "2.6.1"