Merge "Remove getProcessGroup usage in OomAdjuster" am: 720ea3a1

    void setAttachingSchedGroupLSP(ProcessRecord app) {

        int initialSchedGroup = ProcessList.SCHED_GROUP_DEFAULT;

        final ProcessStateRecord state = app.mState;

        // If the process has been marked as foreground via Zygote.START_FLAG_USE_TOP_APP_PRIORITY,

        // then verify that the top priority is actually is applied.

        // If the process has been marked as foreground, it is starting as the top app (with

        // Zygote#START_AS_TOP_APP_ARG), so boost the thread priority of its default UI thread.

        if (state.hasForegroundActivities()) {

            String fallbackReason = null;

            try {

                // The priority must be the same as how does {@link #applyOomAdjLSP} set for

                // {@link ProcessList.SCHED_GROUP_TOP_APP}. We don't check render thread because it

                // is not ready when attaching.

                if (Process.getProcessGroup(app.getPid()) == THREAD_GROUP_TOP_APP) {

                app.getWindowProcessController().onTopProcChanged();

                setThreadPriority(app.getPid(), THREAD_PRIORITY_TOP_APP_BOOST);

                } else {

                    fallbackReason = "not expected top priority";

                }

            } catch (Exception e) {

                fallbackReason = e.toString();

            }

            if (fallbackReason == null) {

                initialSchedGroup = ProcessList.SCHED_GROUP_TOP_APP;

            } else {

                // The real scheduling group will depend on if there is any component of the process

                // did something during attaching.

                Slog.w(TAG, "Fallback pre-set sched group to default: " + fallbackReason);

            } catch (Exception e) {

                Slog.w(TAG, "Failed to pre-set top priority to " + app + " " + e);

            }

        }