Use bootconfig

androidboot.* parameters now passed via bootconfig

Bug: 185211964
Test: atest MicrodroidHostTestCases
Change-Id: I686dbbbcd4fffa7598130139b3bcbe9ee798d666
diff --git a/microdroid/bootconfig.x86_64 b/microdroid/bootconfig.x86_64
new file mode 100644
index 0000000..75e4a80
--- /dev/null
+++ b/microdroid/bootconfig.x86_64
@@ -0,0 +1 @@
+androidboot.boot_devices = pci0000:00/0000:00:01.0,pci0000:00/0000:00:02.0,pci0000:00/0000:00:03.0