Completely migrate init first stage to Soong

adb_debug.prop is migrated too. And ramdisk_available is added to all
dependencies.

Bug: 187196593
Test: boot
Change-Id: I59cd149e0021211b8fd59c44b93bbf18dc8637bf
diff --git a/libkeyutils/Android.bp b/libkeyutils/Android.bp
index 86f68fb..a940b8c 100644
--- a/libkeyutils/Android.bp
+++ b/libkeyutils/Android.bp
@@ -15,6 +15,7 @@
     name: "libkeyutils",
     cflags: ["-Werror"],
     defaults: ["linux_bionic_supported"],
+    ramdisk_available: true,
     recovery_available: true,
     export_include_dirs: ["include/"],
     local_include_dirs: ["include/"],