Introduce build_from_text_stubs property in java_sdk_library

Note that this property is currently a no-op. This change is submitted
separately in order to prevent submitting the entire topic in git_main
to mark a main-only module with this property.

Test: m nothing
Bug: 327507877
Change-Id: I62c2e3522bf9d0c5f7955e7c9bd2e0f66458e48c
diff --git a/java/sdk_library.go b/java/sdk_library.go
index 3931456..c5f7a1c 100644
--- a/java/sdk_library.go
+++ b/java/sdk_library.go
@@ -661,6 +661,10 @@
 	// depend on.
 	Aconfig_declarations []string
 
+	// Determines if the module generates the stubs from the api signature files
+	// instead of the source Java files. Defaults to true.
+	Build_from_text_stub *bool
+
 	// TODO: determines whether to create HTML doc or not
 	// Html_doc *bool
 }