Initial directory structure for androidx.serialization

Bug: 139815871
Test: gw serialization:serialization-common:checkApi serialization:serialization-compiler:checkApi && gw bOS
Change-Id: I538e5a3463f708e9bce70ada3d9ffb85432d4448
diff --git a/settings.gradle b/settings.gradle
index 720685e..07e6679 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -210,6 +210,10 @@
 includeProject(":savedstate", "savedstate")
 includeProject(":security:security-crypto", "security/crypto")
 includeProject(":security:security-identity-credential", "security/identity-credential")
+includeProject(":serialization:serialization-common", "serialization/serialization-common")
+includeProject(":serialization:serialization-compiler", "serialization/serialization-compiler")
+includeProject(":serialization:serialization-lint", "serialization/serialization-lint")
+includeProject(":serialization:serialization-schema", "serialization/serialization-schema")
 includeProject(":sharetarget", "sharetarget")
 includeProject(":sharetarget:integration-tests:testapp", "sharetarget/integration-tests/testapp")
 includeProject(":slice-core", "slices/core")