Move bionic ("runtime") apex definition into bionic/.

Bug: http://b/139176024
Test: boots
Change-Id: Ifc3829e00b99c2f65ed932f0b42ab1ae59fec27c
diff --git a/apex/Android.bp b/apex/Android.bp
new file mode 100644
index 0000000..276541e
--- /dev/null
+++ b/apex/Android.bp
@@ -0,0 +1,43 @@
+// Runtime (Bionic) APEX module
+//
+// In Q this contained Bionic, ART and Libcore.
+// It keeps the name /apex/com.android.runtime for app compat reasons.
+
+android_app_certificate {
+    name: "com.android.runtime.certificate",
+    certificate: "com.android.runtime",
+}
+
+apex_key {
+    name: "com.android.runtime.key",
+    public_key: "com.android.runtime.avbpubkey",
+    private_key: "com.android.runtime.pem",
+}
+
+prebuilt_etc {
+    name: "com.android.runtime.ld.config.txt",
+    src: "ld.config.txt",
+    filename: "ld.config.txt",
+    installable: false,
+}
+
+apex {
+    name: "com.android.runtime",
+    compile_multilib: "both",
+    manifest: "manifest.json",
+    native_shared_libs: [
+        "libc",
+        "libm",
+        "libdl",
+        "libc_malloc_debug",
+        "libc_malloc_hooks",
+    ],
+    multilib: {
+        both: {
+            binaries: ["linker"],
+        },
+    },
+    prebuilts: ["com.android.runtime.ld.config.txt"],
+    key: "com.android.runtime.key",
+    certificate: ":com.android.runtime.certificate",
+}