Add sdk_version:"none" to replace no_standard_libs:true

Where possible this duplicates any tests that use no_standard_libs:true
with ones that use sdk_version:"none". If not possible (e.g. in the
default targets included in java/testing.go) it switches some to use
sdk_version:"none" to ensure that there is no regression in the
behavior of no_standard_libs:true.

Follow up changes will switch all usages of no_standard_libs:true over
to use sdk_version:"none" at which point no_standard_libs will be
removed.

Bug: 134566750
Test: m droid
Change-Id: I5f0fd3daa980f6b223abe454cba7f25a97a39d7a
diff --git a/java/sdk.go b/java/sdk.go
index 76d36f6..9dfb38b 100644
--- a/java/sdk.go
+++ b/java/sdk.go
@@ -54,7 +54,7 @@
 
 func sdkVersionOrDefault(ctx android.BaseModuleContext, v string) string {
 	switch v {
-	case "", "current", "system_current", "test_current", "core_current":
+	case "", "none", "current", "system_current", "test_current", "core_current":
 		return ctx.Config().DefaultAppTargetSdk()
 	default:
 		return v
@@ -65,7 +65,7 @@
 // it returns android.FutureApiLevel (10000).
 func sdkVersionToNumber(ctx android.BaseModuleContext, v string) (int, error) {
 	switch v {
-	case "", "current", "test_current", "system_current", "core_current":
+	case "", "none", "current", "test_current", "system_current", "core_current":
 		return ctx.Config().DefaultAppTargetSdkInt(), nil
 	default:
 		n := android.GetNumericSdkVersion(v)
@@ -187,7 +187,7 @@
 		}
 	}
 
-	if ctx.Config().UnbundledBuildUsePrebuiltSdks() && v != "" {
+	if ctx.Config().UnbundledBuildUsePrebuiltSdks() && v != "" && v != "none" {
 		return toPrebuilt(v)
 	}
 
@@ -201,6 +201,10 @@
 			noStandardLibs:   sdkContext.noStandardLibs(),
 			noFrameworksLibs: sdkContext.noFrameworkLibs(),
 		}
+	case "none":
+		return sdkDep{
+			noStandardLibs: true,
+		}
 	case "current":
 		return toModule("android_stubs_current", "framework-res", sdkFrameworkAidlPath(ctx))
 	case "system_current":