rust: Remove rust_ffi_rlibs, keep rust_ffi_static

rust_ffi_static and rust_ffi_rlibs both alias to rust_library_rlib now.
We need to think about whether we need these aliases at all.

There are no users of rust_ffi_rlibs at the moment as developers are
continuing to declare rust_ffi_static modules. Let's remove this alias
in the meantime at least to simplify things.

Bug: 350633786
Bug: 383552450
Test: m blueprint_tests && m rust
Change-Id: I6be895ddbffc5ac6303f2edc9ab20f7c20cd1591
diff --git a/rust/library_test.go b/rust/library_test.go
index 35a420c..45c0ed6 100644
--- a/rust/library_test.go
+++ b/rust/library_test.go
@@ -202,9 +202,9 @@
 
 func TestNativeDependencyOfRlib(t *testing.T) {
 	ctx := testRust(t, `
-		rust_ffi_rlib {
-			name: "libffi_rlib",
-			crate_name: "ffi_rlib",
+		rust_ffi_static {
+			name: "libffi_static",
+			crate_name: "ffi_static",
 			rlibs: ["librust_rlib"],
 			srcs: ["foo.rs"],
 		}
@@ -227,7 +227,7 @@
 
 	rustRlibRlibStd := ctx.ModuleForTests("librust_rlib", "android_arm64_armv8-a_rlib_rlib-std")
 	rustRlibDylibStd := ctx.ModuleForTests("librust_rlib", "android_arm64_armv8-a_rlib_dylib-std")
-	ffiRlib := ctx.ModuleForTests("libffi_rlib", "android_arm64_armv8-a_rlib_rlib-std")
+	ffiRlib := ctx.ModuleForTests("libffi_static", "android_arm64_armv8-a_rlib_rlib-std")
 
 	modules := []android.TestingModule{
 		rustRlibRlibStd,
@@ -412,10 +412,10 @@
 		t.Errorf("Device rust_ffi_shared does not link libstd as an dylib")
 	}
 	if !android.InList("libstd", libbarFFIRlib.Properties.AndroidMkRlibs) {
-		t.Errorf("Device rust_ffi_rlib does not link libstd as an rlib")
+		t.Errorf("Device rust_ffi_static does not link libstd as an rlib")
 	}
 	if !android.InList("libfoo.rlib-std", libbarFFIRlib.Properties.AndroidMkRlibs) {
-		t.Errorf("Device rust_ffi_rlib does not link dependent rustlib rlib-std variant")
+		t.Errorf("Device rust_ffi_static does not link dependent rustlib rlib-std variant")
 	}
 	if !android.InList("libstd", libbarRlibStd.Properties.AndroidMkRlibs) {
 		t.Errorf("rust_ffi with prefer_rlib does not link libstd as an rlib")