rust: Rust sanitized snapshots variations

This adds support for correctly handling Rust sanitized snapshots,
ensuring they only have one variation.

The presence of multiple variations were causing build failures
when a rust_fuzz module for host was defined and a snapshot
build was requested.

This also sets -Z link-native-libraries=no on host modules
(in addition to device modules) to avoid emitting extra linkage
flags due to link attributes.

Bug: 282897366
Test: SOONG_SDK_SNAPSHOT_USE_SRCJAR=true m
Change-Id: Idf980c29145f11c530ad635a4eb5b01a1730ac24
diff --git a/cc/snapshot_prebuilt.go b/cc/snapshot_prebuilt.go
index bb13310..e29c446 100644
--- a/cc/snapshot_prebuilt.go
+++ b/cc/snapshot_prebuilt.go
@@ -403,11 +403,11 @@
 	Sanitize_minimal_dep *bool `android:"arch_variant"`
 }
 
-type snapshotSanitizer interface {
-	isSanitizerAvailable(t SanitizerType) bool
-	setSanitizerVariation(t SanitizerType, enabled bool)
-	isSanitizerEnabled(t SanitizerType) bool
-	isUnsanitizedVariant() bool
+type SnapshotSanitizer interface {
+	IsSanitizerAvailable(t SanitizerType) bool
+	SetSanitizerVariation(t SanitizerType, enabled bool)
+	IsSanitizerEnabled(t SanitizerType) bool
+	IsUnsanitizedVariant() bool
 }
 
 type snapshotLibraryDecorator struct {
@@ -460,9 +460,9 @@
 		return p.libraryDecorator.link(ctx, flags, deps, objs)
 	}
 
-	if p.isSanitizerEnabled(cfi) {
+	if p.IsSanitizerEnabled(cfi) {
 		p.properties = p.sanitizerProperties.Cfi
-	} else if p.isSanitizerEnabled(Hwasan) {
+	} else if p.IsSanitizerEnabled(Hwasan) {
 		p.properties = p.sanitizerProperties.Hwasan
 	}
 
@@ -526,9 +526,9 @@
 	return false
 }
 
-var _ snapshotSanitizer = (*snapshotLibraryDecorator)(nil)
+var _ SnapshotSanitizer = (*snapshotLibraryDecorator)(nil)
 
-func (p *snapshotLibraryDecorator) isSanitizerAvailable(t SanitizerType) bool {
+func (p *snapshotLibraryDecorator) IsSanitizerAvailable(t SanitizerType) bool {
 	switch t {
 	case cfi:
 		return p.sanitizerProperties.Cfi.Src != nil
@@ -539,23 +539,23 @@
 	}
 }
 
-func (p *snapshotLibraryDecorator) setSanitizerVariation(t SanitizerType, enabled bool) {
-	if !enabled || p.isSanitizerEnabled(t) {
+func (p *snapshotLibraryDecorator) SetSanitizerVariation(t SanitizerType, enabled bool) {
+	if !enabled || p.IsSanitizerEnabled(t) {
 		return
 	}
-	if !p.isUnsanitizedVariant() {
+	if !p.IsUnsanitizedVariant() {
 		panic(fmt.Errorf("snapshot Sanitizer must be one of Cfi or Hwasan but not both"))
 	}
 	p.sanitizerProperties.SanitizerVariation = t
 }
 
-func (p *snapshotLibraryDecorator) isSanitizerEnabled(t SanitizerType) bool {
+func (p *snapshotLibraryDecorator) IsSanitizerEnabled(t SanitizerType) bool {
 	return p.sanitizerProperties.SanitizerVariation == t
 }
 
-func (p *snapshotLibraryDecorator) isUnsanitizedVariant() bool {
-	return !p.isSanitizerEnabled(Asan) &&
-		!p.isSanitizerEnabled(Hwasan)
+func (p *snapshotLibraryDecorator) IsUnsanitizedVariant() bool {
+	return !p.IsSanitizerEnabled(Asan) &&
+		!p.IsSanitizerEnabled(Hwasan)
 }
 
 func snapshotLibraryFactory(image SnapshotImage, moduleSuffix string) (*Module, *snapshotLibraryDecorator) {