Add kotlinx.serialization to manifest

Bug: 327649027
Test: TH
Merged-In: I04763e71c1623256d700222b2ee4571e70b2fc30
Change-Id: Ia43ce452844126d986456b80235dfe197e57da7f
diff --git a/default.xml b/default.xml
index c5ab6db..0a54bfd 100644
--- a/default.xml
+++ b/default.xml
@@ -314,6 +314,7 @@
   <project path="external/kotlinx.atomicfu" name="platform/external/kotlinx.atomicfu" groups="pdk" />
   <project path="external/kotlinx.coroutines" name="platform/external/kotlinx.coroutines" groups="pdk" />
   <project path="external/kotlinx.metadata" name="platform/external/kotlinx.metadata" groups="pdk" />
+  <project path="external/kotlinx.serialization" name="platform/external/kotlinx.serialization" groups="pdk" />
   <project path="external/ktfmt" name="platform/external/ktfmt" groups="pdk" />
   <project path="external/ksoap2" name="platform/external/ksoap2" groups="pdk" />
   <project path="external/ksp" name="platform/external/ksp" groups="pdk" />