Remove post-install verification

post-install verification calls range_sha1() and checks if the given
partition has expected contents. It takes roughly 20 seconds on
angler with 2.8G system image. Remove it to speed up OTA update. Also
abort the update if block_image_update() fails, as we were relying on
post-install verification to capture block_image_update() failures.

Bug: 27729678
Change-Id: I8123cd8929295ec26df247acf6bb51df813771d9

tools/releasetools/common.py

@@ -1335,7 +1335,8 @@ class BlockDifference(object):
     if progress:
       script.ShowProgress(progress, 0)
     self._WriteUpdate(script, output_zip)
-    self._WritePostInstallVerifyScript(script)
+    if OPTIONS.verify:
+      self._WritePostInstallVerifyScript(script)
 
   def WriteStrictVerifyScript(self, script):
     """Verify all the blocks in the care_map, including clobbered blocks.
@@ -1459,7 +1460,8 @@ class BlockDifference(object):
 
     call = ('block_image_update("{device}", '
             'package_extract_file("{partition}.transfer.list"), '
-            '"{partition}.new.dat", "{partition}.patch.dat");\n'.format(
+            '"{partition}.new.dat", "{partition}.patch.dat") ||\n'
+            '    abort("Failed to update {partition} image.");'.format(
                 device=self.device, partition=self.partition))
     script.AppendExtra(script.WordWrap(call))