Component used:StartupTimingMetric
Version used:1.1.0-alpha13
Devices/Android versions reproduced on:R

测试工程说明：
测试项目为多进程项目，包名com.example.demo, 但是应用的所有UI界面实现在com.example.demo:ui进程。

问题原因分析：
getMetrics方法中调用StartupTimingQuery.getFrameSubMetrics 参数传入的是PackageName，参数来源是
Marcobenchmark.kt
val iterationResult = userspaceTrace("extract metrics") {
metrics
// capture list of Map<String,Long> per metric
.map { it.getMetrics(Metric.CaptureInfo(
targetPackageName = packageName,
testPackageName = macrobenchPackageName,
startupMode = startupModeMetricHint,
apiLevel = Build.VERSION.SDK_INT
), tracePath) }
// merge into one map
.reduce { sum, element -> sum + element }
}
查询语句：val queryResult = PerfettoTraceProcessor.rawQuery(
absoluteTracePath = absoluteTracePath,
query = getFullQuery(
testProcessName = testPackageName,
targetProcessName = targetPackageName
)
)

private fun getFullQuery(testProcessName: String, targetProcessName: String) = """
------ Select all startup-relevant slices from slice table
SELECT
slice.name as name,
slice.ts as ts,
slice.dur as dur
FROM slice
INNER JOIN thread_track on slice.track_id = thread_track.id
INNER JOIN thread USING(utid)
INNER JOIN process USING(upid)
WHERE (
(process.name LIKE "$testProcessName" AND slice.name LIKE "startActivityAndWait") OR
(
process.name LIKE "$targetProcessName" AND (
(slice.name LIKE "activityResume" AND process.pid LIKE thread.tid) OR
(slice.name LIKE "Choreographer#doFrame%" AND process.pid LIKE thread.tid) OR
(slice.name LIKE "reportFullyDrawn() for %" AND process.pid LIKE thread.tid) OR
(slice.name LIKE "DrawFrame%" AND thread.name LIKE "RenderThread")
)
) OR
(
-- Signals beginning of launch event, only present in API 29+
process.name LIKE "system_server" AND
slice.name LIKE "MetricsLogger:launchObserverNotifyIntentStarted"
)
)
------ Add in async slices
UNION
SELECT
slice.name as name,
slice.ts as ts,
slice.dur as dur
FROM slice
INNER JOIN process_track on slice.track_id = process_track.id
INNER JOIN process USING(upid)
WHERE (
-- API 23+: "launching: <target>"
-- API 19-22: "launching"
slice.name LIKE "launching%" AND process.name LIKE "system_server"
)
ORDER BY ts ASC
""".trimIndent()

会将packagename 作为限制条件，导致查询不到结果。

对于用户，不能修改这个参数，来达到查询正确进程的目的。

修改建议：
（1）对于Metric 对象是特定进程的时候，开放参数传入指定进程名（默认值是包名）。比如：FrameTimingGfxInfoMetric，FrameTimingMetric，StartupTimingMetric。

（2）目前Metric 是sealed的，建议开放给用户，给用户更多自定义Metric 的空间。