HWC screencap portability improvement

Summary: Removing the only reference to the hardcoded full unix path of screencap.
This will help with portability.

Test: Successful Build on master branch

Change-Id: I8cb83cf312c5dea6f2688864b84145d8eb47be3d
Signed-off-by: Abdelrahman Daim <adaim@meta.com>

Author: adaim-meta

cmds/dumpstate/dumpstate.cpp

@@ -4608,7 +4608,7 @@ void Dumpstate::UpdateProgress(int32_t delta_sec) {
 void Dumpstate::TakeScreenshot(const std::string& path) {
     const std::string& real_path = path.empty() ? screenshot_path_ : path;
     int status =
-        RunCommand("", {"/system/bin/screencap", "-p", real_path},
+        RunCommand("", {"screencap", "-p", real_path},
                    CommandOptions::WithTimeout(10).Always().DropRoot().RedirectStderr().Build());
     if (status == 0) {
         MYLOGD("Screenshot saved on %s\n", real_path.c_str());