Pass input variables to product config

Passing variables via a makefile instead of
rblf_cli / rblf_env allows us to give them correct
types while converting the makefile to starlark,
as opposed to the variables always being strings
when given via rblf_cli / rblf_env.

This also allows us to remove some hand-converted
starlark code.

Bug: 201700692
Test: ./out/soong/rbcrun ./build/make/tests/run.rbc
Change-Id: I58c4f20b29171c14e5ae759beb26a849426f6961

tests/input_variables.rbc

@@ -0,0 +1,28 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This file was generated by running `m RBC_PRODUCT_CONFIG=1 nothing`
+# and then copying it from out/rbc/out/rbc/make_vars_pre_product_config.rbc.
+# It was manually trimmed down afterwards to just the variables we need.
+
+load("//build/make/core:product_config.rbc", "rblf")
+
+def init(g, handle):
+  cfg = rblf.cfg(handle)
+  g["PLATFORM_VERSION_CODENAME"] = "Tiramisu"
+  g["PLATFORM_VERSION"] = "Tiramisu"
+  g["TARGET_BUILD_VARIANT"] = "userdebug"
+  g["TARGET_BUILD_TYPE"] = "release"
+  g["TARGET_PRODUCT"] = "aosp_arm64"
+  g["PLATFORM_SDK_VERSION"] = "31"