HAL for Resume on Reboot

This adds a HAL interface for escrowing a key over reboot during an OTA
that will unlock the Synthetic Password when the OTA has completed
successfully.

Bug: 63928581
Test: make
Test: atest VtsHalRebootEscrowTargetTest
Change-Id: I8485f3821157e67b6651f4fe425e46cb4499c710
diff --git a/rebootescrow/aidl/Android.bp b/rebootescrow/aidl/Android.bp
new file mode 100644
index 0000000..7bc8d6f
--- /dev/null
+++ b/rebootescrow/aidl/Android.bp
@@ -0,0 +1,18 @@
+aidl_interface {
+    name: "vintf-rebootescrow",
+    vendor_available: true,
+    srcs: [
+        "android/hardware/rebootescrow/IRebootEscrow.aidl",
+    ],
+    stability: "vintf",
+    backend: {
+        java: {
+            platform_apis: true,
+        },
+        ndk: {
+            vndk: {
+                enabled: true,
+            },
+        },
+    },
+}