Directory setup for Privacy Sandbox tools.

These tools will be used to define a type-safe API for SDKs running in
the Privacy Sandbox.

:tools library will contain the annotations used to define the SDK APIs.
:tools-apicompiler will contain the annotation processor that creates
	the server-side (sandbox-side) implementation of these APIs.
	Called during SDK compilation.
:tools-apigenerator will consume API descriptions and generate the
	client-side (app-side) implementation of the APIs. Called during
	app compilation.

Relnote: N/A
Test: build
Change-Id: I79ea22dbae59c29d5258b21c36409edf4fc8aadc
diff --git a/docs-tip-of-tree/build.gradle b/docs-tip-of-tree/build.gradle
index ffc1efc..582f65c 100644
--- a/docs-tip-of-tree/build.gradle
+++ b/docs-tip-of-tree/build.gradle
@@ -235,6 +235,9 @@
     docs(project(":preference:preference"))
     docs(project(":preference:preference-ktx"))
     docs(project(":print:print"))
+    docs(project(":privacysandbox:tools:tools"))
+    docs(project(":privacysandbox:tools:tools-apicompiler"))
+    docs(project(":privacysandbox:tools:tools-apigenerator"))
     docs(project(":profileinstaller:profileinstaller"))
     docs(project(":recommendation:recommendation"))
     docs(project(":recyclerview:recyclerview"))