Optimization: remove duplicated flags computations for getInstalledPackages

Below are some test runs that show 100 iterations of getInstalledPackages ran
at activity startup of touchlatency app to demonstrate the perf cost.

R Baseline:
https://screenshot.googleplex.com/PnVi5APraJo
https://pprof.corp.google.com/?id=dc105ca9592f8367c381e2dcf7f1847d

R Optimized:
https://pprof.corp.google.com/?id=2d1d9fadc20bcc61d41bd52116bd94e3
https://screenshot.googleplex.com/OAwJnvwPqPH

Savings: 8% of system_server binder response time when the call is executed.

In terms total binder transaction time. Savings are 2% of the total
binder call time.

Exempt-From-Owner-Approval: CP to correct branch for R

Bug: 153656459

Test: atest FrameworksServicesTests:PackageParserTest
Test: atest FrameworksServicesTests:PackageParserLegacyCoreTest
Test: atest FrameworksServicesTests:ScanTests
Test: atest FrameworksServicesTests:ParallelPackageParserTest

Merged-In: I2de9cf1f754a505239d4416e1fc70bf77932c5db
Change-Id: I2de9cf1f754a505239d4416e1fc70bf77932c5db
(cherry picked from commit 7cb9e5f671)

core/java/android/content/pm/parsing/PackageInfoWithoutStateUtils.java

@@ -350,9 +350,6 @@ public class PackageInfoWithoutStateUtils {
         // TODO(b/135203078): Consolidate the data directory logic, remove initForUser
         ai.initForUser(userId);
 
-        ai.flags = appInfoFlags(pkg);
-        ai.privateFlags = appInfoPrivateFlags(pkg);
-
         if ((flags & PackageManager.GET_META_DATA) == 0) {
             ai.metaData = null;
         }

core/java/android/content/pm/parsing/ParsingPackageImpl.java

@@ -850,9 +850,15 @@ public class ParsingPackageImpl implements ParsingPackage, Parcelable {
     @Deprecated
     @Override
     public ApplicationInfo toAppInfoWithoutState() {
-        ApplicationInfo appInfo = new ApplicationInfo();
+        ApplicationInfo appInfo = toAppInfoWithoutStateWithoutFlags();
         appInfo.flags = PackageInfoWithoutStateUtils.appInfoFlags(this);
         appInfo.privateFlags = PackageInfoWithoutStateUtils.appInfoPrivateFlags(this);
+        return appInfo;
+    }
+
+    @Override
+    public ApplicationInfo toAppInfoWithoutStateWithoutFlags() {
+        ApplicationInfo appInfo = new ApplicationInfo();
 
         appInfo.appComponentFactory = appComponentFactory;
         appInfo.backupAgentName = backupAgentName;

core/java/android/content/pm/parsing/ParsingPackageRead.java

@@ -858,4 +858,9 @@ public interface ParsingPackageRead extends Parcelable {
 
     // TODO(b/135203078): Hide and enforce going through PackageInfoUtils
     ApplicationInfo toAppInfoWithoutState();
+
+    /**
+     * same as toAppInfoWithoutState except without flag computation.
+     */
+    ApplicationInfo toAppInfoWithoutStateWithoutFlags();
 }

services/core/java/com/android/server/pm/parsing/PackageInfoUtils.java

@@ -235,8 +235,9 @@ public class PackageInfoUtils {
         info.primaryCpuAbi = AndroidPackageUtils.getPrimaryCpuAbi(pkg, pkgSetting);
         info.secondaryCpuAbi = AndroidPackageUtils.getSecondaryCpuAbi(pkg, pkgSetting);
 
-        info.flags |= appInfoFlags(pkg, pkgSetting);
-        info.privateFlags |= appInfoPrivateFlags(pkg, pkgSetting);
+        info.flags |= appInfoFlags(info.flags, pkgSetting);
+        info.privateFlags |= appInfoPrivateFlags(info.privateFlags, pkgSetting);
+
         return info;
     }
 
@@ -455,9 +456,18 @@ public class PackageInfoUtils {
     public static int appInfoFlags(AndroidPackage pkg, @Nullable PackageSetting pkgSetting) {
         // TODO(b/135203078): Add setting related state
         // @formatter:off
-        int flags = PackageInfoWithoutStateUtils.appInfoFlags(pkg)
+        int pkgWithoutStateFlags = PackageInfoWithoutStateUtils.appInfoFlags(pkg)
                 | flag(pkg.isSystem(), ApplicationInfo.FLAG_SYSTEM)
                 | flag(pkg.isFactoryTest(), ApplicationInfo.FLAG_FACTORY_TEST);
+
+        return appInfoFlags(pkgWithoutStateFlags, pkgSetting);
+        // @formatter:on
+    }
+
+    /** @see ApplicationInfo#flags */
+    public static int appInfoFlags(int pkgWithoutStateFlags, @NonNull PackageSetting pkgSetting) {
+        // @formatter:off
+        int flags = pkgWithoutStateFlags;
         if (pkgSetting != null) {
             flags |= flag(pkgSetting.getPkgState().isUpdatedSystemApp(), ApplicationInfo.FLAG_UPDATED_SYSTEM_APP);
         }
@@ -467,9 +477,8 @@ public class PackageInfoUtils {
 
     /** @see ApplicationInfo#privateFlags */
     public static int appInfoPrivateFlags(AndroidPackage pkg, @Nullable PackageSetting pkgSetting) {
-        // TODO(b/135203078): Add setting related state
         // @formatter:off
-        return PackageInfoWithoutStateUtils.appInfoPrivateFlags(pkg)
+        int pkgWithoutStateFlags = PackageInfoWithoutStateUtils.appInfoPrivateFlags(pkg)
                 | flag(pkg.isSystemExt(), ApplicationInfo.PRIVATE_FLAG_SYSTEM_EXT)
                 | flag(pkg.isPrivileged(), ApplicationInfo.PRIVATE_FLAG_PRIVILEGED)
                 | flag(pkg.isOem(), ApplicationInfo.PRIVATE_FLAG_OEM)
@@ -477,6 +486,15 @@ public class PackageInfoUtils {
                 | flag(pkg.isProduct(), ApplicationInfo.PRIVATE_FLAG_PRODUCT)
                 | flag(pkg.isOdm(), ApplicationInfo.PRIVATE_FLAG_ODM)
                 | flag(pkg.isSignedWithPlatformKey(), ApplicationInfo.PRIVATE_FLAG_SIGNED_WITH_PLATFORM_KEY);
+        return appInfoPrivateFlags(pkgWithoutStateFlags, pkgSetting);
+        // @formatter:on
+    }
+
+    /** @see ApplicationInfo#privateFlags */
+    public static int appInfoPrivateFlags(int pkgWithoutStateFlags, @Nullable PackageSetting pkgSetting) {
+        // @formatter:off
+        // TODO: Add state specific flags
+        return pkgWithoutStateFlags;
         // @formatter:on
     }
 

services/core/java/com/android/server/pm/parsing/pkg/AndroidPackage.java

@@ -300,6 +300,12 @@ public interface AndroidPackage extends PkgAppInfo, PkgPackageInfo, ParsingPacka
     @NonNull
     ApplicationInfo toAppInfoWithoutState();
 
+    /**
+     * Same as toAppInfoWithoutState except it does not compute any flags.
+     */
+    @NonNull
+    ApplicationInfo toAppInfoWithoutStateWithoutFlags();
+
     /**
      * TODO(b/135203078): Remove usages?
      * @return a mock of what the previous package.applicationInfo would've returned for logging

services/core/java/com/android/server/pm/parsing/pkg/PackageImpl.java

@@ -455,7 +455,7 @@ public final class PackageImpl extends ParsingPackageImpl implements ParsedPacka
 
     @Override
     public ApplicationInfo toAppInfoWithoutState() {
-        ApplicationInfo appInfo = super.toAppInfoWithoutState();
+        ApplicationInfo appInfo = super.toAppInfoWithoutStateWithoutFlags();
         appInfo.flags = PackageInfoUtils.appInfoFlags(this, null);
         appInfo.privateFlags = PackageInfoUtils.appInfoPrivateFlags(this, null);
         appInfo.nativeLibraryDir = nativeLibraryDir;