Bp2build support for sdk_version and java_version.

This CL adds java_version and sdk_version support to bp2build
converters for
   - java library
   - java binary
   - android library
   - android binary
   - android library import

Although java import doesn't support java_version and sdk_version, the
neverlink java_library wrapper around a java_import must specify a
sdk_version when targetting a device. "none" is used by convention.

Change-Id: I22a69dea2e351858368df69ed6a703b568d613ea
Bug: 215230098
Test: Presubmits
diff --git a/java/app.go b/java/app.go
index 52caf6d..03e2330 100755
--- a/java/app.go
+++ b/java/app.go
@@ -1565,6 +1565,9 @@
 
 		appAttrs.bazelAapt = &bazelAapt{Manifest: aapt.Manifest}
 		appAttrs.Deps = bazel.MakeSingleLabelListAttribute(bazel.Label{Label: ":" + ktName})
+		appAttrs.javaCommonAttributes = &javaCommonAttributes{
+			Sdk_version: commonAttrs.Sdk_version,
+		}
 	}
 
 	ctx.CreateBazelTargetModule(