Add notice property to all modules

Add a notice property to all modules which, if set, propagates to
LOCAL_NOTICE_FILE in make.

Test: m -j checkbuild, examine out/soong/Android*.mk
Change-Id: I565a5624dfd7b376b976b1a43dac5cea96869026

android/module.go

@@ -162,6 +162,9 @@ type commonProperties struct {
 	// names of other modules to install if this module is installed
 	Required []string `android:"arch_variant"`
 
+	// relative path to a file to include in the list of notices for the device
+	Notice *string
+
 	// Set by TargetMutator
 	CompileTarget  Target `blueprint:"mutated"`
 	CompilePrimary bool   `blueprint:"mutated"`