Add few more Java and Kotlin system toolchains

Summary: We really do have too many of these

Reviewed By: blackm00n

Differential Revision: D74076435

fbshipit-source-id: aa0d61fbb987b114e135494d0fe90fda4b318bba

Author: Ian Childs

prelude/toolchains/demo.bzl

@@ -78,6 +78,18 @@ def system_demo_toolchains():
         visibility = ["PUBLIC"],
     )
 
+    system_java_bootstrap_toolchain(
+        name = "java_graalvm_bootstrap",
+        java = ":java_tool",
+        visibility = ["PUBLIC"],
+    )
+
+    system_java_bootstrap_toolchain(
+        name = "java_for_android",
+        java = ":java_tool",
+        visibility = ["PUBLIC"],
+    )
+
     system_java_tool(
         name = "java_tool",
         tool_name = "java",
@@ -95,6 +107,11 @@ def system_demo_toolchains():
         visibility = ["PUBLIC"],
     )
 
+    system_kotlin_bootstrap_toolchain(
+        name = "kotlin_for_android",
+        visibility = ["PUBLIC"],
+    )
+
     system_ocaml_toolchain(
         name = "ocaml",
         visibility = ["PUBLIC"],