Use raw {min,target}_sdk_version properties in android_app converter

The logic of EffectiveVersionString is product-variable dependent and
is being implemented bazel-side in order to produce product agnostic
BUILD files. A required additional product variable is added to the
export list, and the "updatable" property of android_app is also bp2build-converted.
Handling of max sdk version was not correct (it does not affect
manifest values in Soong), so removing it for now.

Bug: 274474008
Bug: 274474002
Test: CI
Change-Id: I7a10bfabf914c8e86064b7ce61926701f87517e3
diff --git a/bp2build/android_app_conversion_test.go b/bp2build/android_app_conversion_test.go
index 0d206b0..1503cf0 100644
--- a/bp2build/android_app_conversion_test.go
+++ b/bp2build/android_app_conversion_test.go
@@ -423,7 +423,6 @@
 	name: "foo",
 	sdk_version: "current",
 	min_sdk_version: "24",
-	max_sdk_version: "30",
 	target_sdk_version: "29",
 	optimize: {
 		enabled: false,
@@ -435,7 +434,6 @@
 				"manifest":       `"AndroidManifest.xml"`,
 				"resource_files": `[]`,
 				"manifest_values": `{
-        "maxSdkVersion": "30",
         "minSdkVersion": "24",
         "targetSdkVersion": "29",
     }`,
@@ -464,12 +462,8 @@
 			MakeBazelTarget("android_binary", "foo", AttrNameToString{
 				"manifest":       `"AndroidManifest.xml"`,
 				"resource_files": `[]`,
-				"manifest_values": `{
-        "minSdkVersion": "30",
-        "targetSdkVersion": "30",
-    }`,
-				"sdk_version": `"30"`,
-				"optimize":    `False`,
+				"sdk_version":    `"30"`,
+				"optimize":       `False`,
 			}),
 		}})
 }