Make first_release required

(cherry picked from commit 33e9399445)

Defaulting the first_release to LATEST is dangerous because it is easy
to forget and any module that does not provide it will not be built for
a release specific build.

Adds Tiramisu for the mainline modules that were missing it and
defaults it to LATEST for BundledMainlineModules as they don't need to
be built for a previous release.

Bug: 228807460
Test: packages/modules/common/build/mainline_modules_sdks.py
Merged-In: I151773f80e37a6dd7de7b6df9cfa3f0a624d38f4
Change-Id: I151773f80e37a6dd7de7b6df9cfa3f0a624d38f4

build/mainline_modules_sdks.py

@@ -611,11 +611,7 @@ class MainlineModule:
     #       source was first included. So, a module that was added in build T
     #       could potentially be used in an S release and so its SDK will need
     #       to be made available for S builds.
-    #
-    # Defaults to the latest build, i.e. the build on which this script is run
-    # as the snapshot is assumed to be needed in the build containing the sdk
-    # source.
-    first_release: BuildRelease = LATEST
+    first_release: BuildRelease
 
     # The configuration variable, defaults to ANDROID:module_build_from_source
     configVar: ConfigVar = ConfigVar(
@@ -660,6 +656,10 @@ class BundledMainlineModule(MainlineModule):
     A bundled module is always preloaded into the platform images.
     """
 
+    # Defaults to the latest build, i.e. the build on which this script is run
+    # as bundled modules are, by definition, only needed in this build.
+    first_release: BuildRelease = LATEST
+
     def is_bundled(self):
         return True
 
@@ -739,6 +739,11 @@ MAINLINE_MODULES = [
             # bootclasspath.
         ]),
     ),
+    MainlineModule(
+        apex="com.android.scheduling",
+        sdks=["scheduling-sdk"],
+        first_release=S,
+    ),
     MainlineModule(
         apex="com.android.sdkext",
         sdks=["sdkextensions-sdk"],
@@ -773,7 +778,7 @@ MAINLINE_MODULES = [
     ),
 ]
 
-# List of Mainline modules that currently are never built unbundled. They should
+# List of Mainline modules that currently are never built unbundled. They must
 # not specify first_release, and they don't have com.google.android
 # counterparts.
 BUNDLED_MAINLINE_MODULES = [