Clean up some code in incremental_install.py .

--
MOS_MIGRATED_REVID=100655790
diff --git a/tools/android/incremental_install.py b/tools/android/incremental_install.py
index 09fa849..c8b15eb 100644
--- a/tools/android/incremental_install.py
+++ b/tools/android/incremental_install.py
@@ -498,9 +498,10 @@
   else:
     # Otherwise, parse the manifest. Note that this branch is also taken if the
     # manifest is empty.
-    for name, checksum in [
-        l.split(" ") for l in device_manifest.split("\n") if l]:
-      device_checksums[name] = checksum
+    for manifest_line in device_manifest.split("\n"):
+      if manifest_line:
+        name, checksum = manifest_line.split(" ")
+        device_checksums[name] = checksum
 
   libs_to_delete = set(device_checksums) - set(install_checksums)
   libs_to_upload = set(install_checksums) - set(device_checksums)