Reject native verification parse errors before launch and fix split dispatch branch

tools/android/test-final-syntax.ps1

@@ -0,0 +1,12 @@
+param([Parameter(Mandatory)][string]$EvidenceDir,[string[]]$Sources)
+$ErrorActionPreference='Stop'
+New-Item -ItemType Directory -Path $EvidenceDir -Force|Out-Null
+if(!$Sources){$Sources=@(Get-ChildItem $PSScriptRoot -Filter '*.ps1'|Select-Object -ExpandProperty FullName)}
+$results=@(foreach($source in $Sources){
+    $errors=$null
+    [Management.Automation.Language.Parser]::ParseFile($source,[ref]$null,[ref]$errors)|Out-Null
+    @{source=$source;passed=($errors.Count-eq0);errors=@($errors|Select-Object ErrorId,Message,@{n='line';e={$_.Extent.StartLineNumber}})}
+})
+$passed=$results.Count-gt0-and@($results|Where-Object passed -ne $true).Count-eq0
+@{passed=$passed;checks=$results}|ConvertTo-Json -Depth 8|Set-Content (Join-Path $EvidenceDir 'syntax-result.json')
+if(!$passed){exit 1};exit 0