Merge "Compute SHA256 digest of binaries asynchronously post boot."

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.concurrent.Executors;

import java.util.stream.Collectors;

/**

        // we are only interested in doing things at PHASE_BOOT_COMPLETED

        if (phase == PHASE_BOOT_COMPLETED) {

            // due to potentially long computation that holds up boot time, apex sha computations

            // are deferred to first call

            Slog.i(TAG, "Boot completed. Getting VBMeta Digest.");

            getVBMetaDigestInformation();

            // due to potentially long computation that may hold up boot time, SHA256 computations

            // for APEXs and Modules will be executed via threads.

            Slog.i(TAG, "Executing APEX & Module digest computations");

            computeApexAndModuleDigests();

        }

    }

        FrameworkStatsLog.write(FrameworkStatsLog.VBMETA_DIGEST_REPORTED, mVbmetaDigest);

    }

    private void computeApexAndModuleDigests() {

        // using Executors will allow the computations to be done asynchronously, thus not holding

        // up boot time.

        Executors.defaultThreadFactory().newThread(() -> updateBinaryMeasurements()).start();

    }

    @NonNull

    private List<PackageInfo> getInstalledApexs() {

        List<PackageInfo> results = new ArrayList<PackageInfo>();