Fix Flutter tool to use correct adb parameter and collect Realtime value. (#49701)

* Fix parameter to adb to be _package.id instead of package._launchActivity.

packages/flutter_tools/lib/src/android/android_device.dart

@@ -659,9 +659,10 @@ class AndroidDevice extends Device {
       'shell',
       'dumpsys',
       'meminfo',
-      _package.launchActivity,
+      _package.id,
       '-d',
     ]));
+
     if (runResult.exitCode != 0) {
       return const MemoryInfo.empty();
     }
@@ -801,8 +802,15 @@ Map<String, String> parseAdbDeviceProperties(String str) {
 @visibleForTesting
 AndroidMemoryInfo parseMeminfoDump(String input) {
   final AndroidMemoryInfo androidMemoryInfo = AndroidMemoryInfo();
-  input
-    .split('\n')
+
+  final List<String> lines = input.split('\n');
+
+  final String timelineData = lines.firstWhere((String line) =>
+    line.startsWith('${AndroidMemoryInfo._kUpTimeKey}: '));
+  final List<String> times = timelineData.trim().split('${AndroidMemoryInfo._kRealTimeKey}:');
+  androidMemoryInfo.realTime = int.tryParse(times.last.trim()) ?? 0;
+
+  lines
     .skipWhile((String line) => !line.contains('App Summary'))
     .takeWhile((String line) => !line.contains('TOTAL'))
     .where((String line) => line.contains(':'))
@@ -863,6 +871,8 @@ List<AndroidDevice> getAdbDevices() {
 
 /// Android specific implementation of memory info.
 class AndroidMemoryInfo extends MemoryInfo {
+  static const String _kUpTimeKey = 'Uptime';
+  static const String _kRealTimeKey = 'Realtime';
   static const String _kJavaHeapKey = 'Java Heap';
   static const String _kNativeHeapKey = 'Native Heap';
   static const String _kCodeKey = 'Code';
@@ -872,6 +882,10 @@ class AndroidMemoryInfo extends MemoryInfo {
   static const String _kSystemKey = 'System';
   static const String _kTotalKey = 'Total';
 
+  // Realtime is time since the system was booted includes deep sleep. Clock
+  // is monotonic, and ticks even when the CPU is in power saving modes.
+  int realTime = 0;
+
   // Each measurement has KB as a unit.
   int javaHeap = 0;
   int nativeHeap = 0;
@@ -885,6 +899,7 @@ class AndroidMemoryInfo extends MemoryInfo {
   Map<String, Object> toJson() {
     return <String, Object>{
       'platform': 'Android',
+      _kRealTimeKey: realTime,
       _kJavaHeapKey: javaHeap,
       _kNativeHeapKey: nativeHeap,
       _kCodeKey: code,

packages/flutter_tools/test/general.shard/android/android_device_test.dart

@@ -818,6 +818,7 @@ Uptime: 441088659 Realtime: 521464097
     final AndroidMemoryInfo result = parseMeminfoDump(exampleOutput);
 
     // Parses correctly
+    expect(result.realTime, 521464097);
     expect(result.javaHeap, 4296);
     expect(result.nativeHeap, 8620);
     expect(result.code, 11288);
@@ -829,6 +830,7 @@ Uptime: 441088659 Realtime: 521464097
     // toJson works correctly
     final Map<String, Object> json = result.toJson();
 
+    expect(json, containsPair('Realtime', 521464097));
     expect(json, containsPair('Java Heap', 4296));
     expect(json, containsPair('Native Heap', 8620));
     expect(json, containsPair('Code', 11288));