Use bootconfig

androidboot.* parameters now passed via bootconfig

Bug: 185211964
Test: atest MicrodroidHostTestCases
Change-Id: I686dbbbcd4fffa7598130139b3bcbe9ee798d666
diff --git a/microdroid/bootconfig.arm64 b/microdroid/bootconfig.arm64
new file mode 100644
index 0000000..b1e6d56
--- /dev/null
+++ b/microdroid/bootconfig.arm64
@@ -0,0 +1 @@
+androidboot.boot_devices = 10000.pci