Android: switch to device.IsApplicationInstalled

No change to logic. This switches to the new
device.IsApplicationInstalled() where it helps code readability.

Bug: 1002774
Test: Manual - try the scripts
Change-Id: I514310922e2453ff887028006e7d97939de81139
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1808586
Auto-Submit: Nate Fischer <ntfschr@chromium.org>
Commit-Queue: John Budorick <jbudorick@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697254}

android_webview/tools/remove_preinstalled_webview.py

@@ -74,11 +74,10 @@ def UninstallWebViewUpdates(device):
 def CheckWebViewIsUninstalled(device):
   """Throws if WebView is still installed."""
   for webview_package in WEBVIEW_PACKAGES:
-    paths = device.GetApplicationPaths(webview_package)
-    if paths:
+    if device.IsApplicationInstalled(webview_package):
       raise device_errors.CommandFailedError(
-          '{} is still installed on the device at {}'.format(
-              webview_package, paths), device)
+          '{} is still installed on the device'.format(webview_package),
+          device)
 
 
 def RemovePreinstalledWebViews(device):

build/android/update_verification.py

@@ -49,8 +49,7 @@ def TestUpdate(device, old_apk, new_apk, app_data, package_name):
   # Restore command is not synchronous
   raw_input('Select "Restore my data" on the device. Then press enter to '
             'continue.')
-  device_path = device.GetApplicationPaths(package_name)
-  if not device_path:
+  if not device.IsApplicationInstalled(package_name):
     raise Exception('Expected package %s to already be installed. '
                     'Package name might have changed!' % package_name)