Support building all variants. am: 4ec2003b4d

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures-task/+/1356129

Change-Id: I2491fc984fa15b6e991cda8fc50750d8e0e91307
diff --git a/Android.bp b/Android.bp
index cea0f97..9ed8e0b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,6 +1,6 @@
 // This file is generated by cargo2android.py --run --device.
 
-rust_library_rlib {
+rust_library {
     name: "libfutures_task",
     host_supported: true,
     crate_name: "futures_task",
@@ -12,7 +12,7 @@
         "once_cell",
         "std",
     ],
-    rlibs: [
+    rustlibs: [
         "libonce_cell",
     ],
 }