manager: Add support to disable sucompat mode.

manager/app/src/main/cpp/ksu.cc

@@ -27,6 +27,8 @@
 
 #define CMD_IS_UID_GRANTED_ROOT 12
 #define CMD_IS_UID_SHOULD_UMOUNT 13
+#define CMD_IS_SU_ENABLED 14
+#define CMD_ENABLE_SU 15
 
 static bool ksuctl(int cmd, void* arg1, void* arg2) {
     int32_t result = 0;
@@ -84,3 +86,14 @@ bool set_app_profile(const app_profile *profile) {
 bool get_app_profile(p_key_t key, app_profile *profile) {
     return ksuctl(CMD_GET_APP_PROFILE, (void*) profile, nullptr);
 }
+
+bool set_su_enabled(bool enabled) {
+    return ksuctl(CMD_ENABLE_SU, (void*) enabled, nullptr);
+}
+
+bool is_su_enabled() {
+    bool enabled = true;
+    // if ksuctl failed, we assume su is enabled, and it cannot be disabled.
+    ksuctl(CMD_IS_SU_ENABLED, &enabled, nullptr);
+    return enabled;
+}