Force APKs to be streamed

When using the new "cmd" command, APKs must be streamed instead of specifying
a file.

Change-Id: I977cd817ac545d7c5293f53b9fa4b155bea7449e
Fixes: 31251489
Test: manually installed packages using 'adb install', 'adb shell cmd package install' and 'adb shell pm install'
diff --git a/services/core/java/com/android/server/pm/PackageManagerShellCommand.java b/services/core/java/com/android/server/pm/PackageManagerShellCommand.java
index 07dc404..251b277 100644
--- a/services/core/java/com/android/server/pm/PackageManagerShellCommand.java
+++ b/services/core/java/com/android/server/pm/PackageManagerShellCommand.java
@@ -1146,14 +1146,15 @@
     private int doWriteSplit(int sessionId, String inPath, long sizeBytes, String splitName,
             boolean logSuccess) throws RemoteException {
         final PrintWriter pw = getOutPrintWriter();
-        if ("-".equals(inPath)) {
-            inPath = null;
-        } else if (inPath != null) {
-            final File file = new File(inPath);
-            if (file.isFile()) {
-                sizeBytes = file.length();
-            }
+        if (sizeBytes <= 0) {
+            pw.println("Error: must specify a APK size");
+            return 1;
         }
+        if (inPath != null && !"-".equals(inPath)) {
+            pw.println("Error: APK content must be streamed");
+            return 1;
+        }
+        inPath = null;
 
         final SessionInfo info = mInterface.getPackageInstaller().getSessionInfo(sessionId);