Match src paths with aidl package name

In order for the build system to track updates to the header files
during incremental builds, always specify the src files using the same
path as the package for C++ compilations.

Bug: 112114177
Test: m
Change-Id: Iec355bf4c11204a09bb164bbf14eaa1a148c5f36

storaged/Android.bp

@@ -62,7 +62,7 @@ cc_library_static {
         "uid_info.cpp",
         "storaged.proto",
         ":storaged_aidl",
-        "binder/android/os/storaged/IStoragedPrivate.aidl",
+        ":storaged_aidl_private",
     ],
 
     static_libs: ["libhealthhalutils"],
@@ -116,4 +116,13 @@ filegroup {
     srcs: [
         "binder/android/os/IStoraged.aidl",
     ],
+    path: "binder",
+}
+
+filegroup {
+    name: "storaged_aidl_private",
+    srcs: [
+        "binder/android/os/storaged/IStoragedPrivate.aidl",
+    ],
+    path: "binder",
 }