Fix PDK build

This commit moves "IConfirmationPromptCallback.aidl" and
"IKeystoreService.aidl" to "system/security/keystore/binder" so that
"libkeystore_aidl" can be built in PDK builds.

Test: Run `cts-tradefed run cts -m CtsKeystoreTestCases` on Pixel 2017
and the test results are idential with and without this CL.

Test: Build PDK with special manifest described in
http://b/69539820#comment18 and http://b/69539820#comment19.

Test: Build a target (described in http://b/72961456) with
`platform.zip` built from master FSK source tree.

Bug: 69539820
Bug: 72961456
Change-Id: I7350f0ca943b15a6f3e40023a6cc299bdf8aed0e

core/java/Android.bp

@@ -7,33 +7,3 @@ filegroup {
     name: "IDropBoxManagerService.aidl",
     srcs: ["com/android/internal/os/IDropBoxManagerService.aidl"],
 }
-
-// only used by key_store_service
-cc_library_shared {
-    name: "libkeystore_aidl",
-    srcs: ["android/security/IKeystoreService.aidl",
-           "android/security/IConfirmationPromptCallback.aidl"],
-    aidl: {
-        export_aidl_headers: true,
-        include_dirs: [
-            "frameworks/base/core/java/",
-            "system/security/keystore/",
-        ],
-    },
-    shared_libs: [
-        "libbinder",
-        "libcutils",
-        "libhardware",
-        "libhidlbase",
-        "libhidltransport",
-        "libhwbinder",
-        "liblog",
-        "libkeystore_parcelables",
-        "libselinux",
-        "libutils",
-    ],
-    export_shared_lib_headers: [
-        "libbinder",
-        "libkeystore_parcelables",
-    ],
-}