Modify Soong to utilize from-text android.jar in build

Context
- from-text android.jar files are built using Metalava, and these can be
  utilized in `decodeSdkDep` so that any modules that depends on APIs
  can be compiled using from-text android.jars
- This change removes dependency on source java files when compiling
  stub android.jar files

Implementation
- Modify java_api_library module to create system modules using the
  generated android.jar
- Replace modules in decodeSdkDep to link against java_api_library
  modules
- Add --build-from-text-stub flag to hide the feature behind a flag

Test: m --build-from-text-stub
Bug: 271154441
Change-Id: I104df595edc65c0006820d5ae5b15f1fb167e190

1 files changed, 18 insertions, 1 deletions

diff --git a/java/java.go b/java/java.go
index 370781599..91193ccc1 100644
--- a/java/java.go
+++ b/java/java.go
@@ -1692,6 +1692,12 @@ func metalavaStubCmd(ctx android.ModuleContext, rule *android.RuleBuilder,
 		Flag("--color").
 		Flag("--quiet").
 		Flag("--format=v2").
+		Flag("--include-annotations").
+		// The flag makes nullability issues as warnings rather than errors by replacing
+		// @Nullable/@NonNull in the listed packages APIs with @RecentlyNullable/@RecentlyNonNull,
+		// and these packages are meant to have everything annotated
+		// @RecentlyNullable/@RecentlyNonNull.
+		FlagWithArg("--force-convert-to-warning-nullability-annotations ", "+*:-android.*:+android.icu.*:-dalvik.*").
 		FlagWithArg("--repeat-errors-max ", "10").
 		FlagWithArg("--hide ", "UnresolvedImport").
 		FlagWithArg("--hide ", "InvalidNullabilityOverride").
@@ -1700,6 +1706,14 @@ func metalavaStubCmd(ctx android.ModuleContext, rule *android.RuleBuilder,
 	return cmd
 }
 
+func (al *ApiLibrary) HeaderJars() android.Paths {
+	return android.Paths{al.stubsJar}
+}
+
+func (al *ApiLibrary) OutputDirAndDeps() (android.Path, android.Paths) {
+	return nil, nil
+}
+
 func (al *ApiLibrary) stubsFlags(ctx android.ModuleContext, cmd *android.RuleBuilderCommand, stubsDir android.OptionalPath) {
 	if stubsDir.Valid() {
 		cmd.FlagWithArg("--stubs ", stubsDir.String())
@@ -1797,7 +1811,10 @@ func (al *ApiLibrary) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	ctx.Phony(ctx.ModuleName(), al.stubsJar)
 
 	ctx.SetProvider(JavaInfoProvider, JavaInfo{
-		HeaderJars: android.PathsIfNonNil(al.stubsJar),
+		HeaderJars:                     android.PathsIfNonNil(al.stubsJar),
+		ImplementationAndResourcesJars: android.PathsIfNonNil(al.stubsJar),
+		ImplementationJars:             android.PathsIfNonNil(al.stubsJar),
+		AidlIncludeDirs:                android.Paths{},
 	})
 }