[devicelab] dont strip symbols in platform views layout test. (#163101)

The hcpp integration test is crashing I'd like to see why and also not
deal with manually downloading symbol files and using ndk-stack.

Since we don't strip the libraries, all we need to do is add a gradle
configuration so that stack traces are readable in the logs.
https://dart.googlesource.com/external/github.com/flutter/flutter/+/75cbf377fdfcee8235506cf231f428bc3e542b07

DEPS

diff --git a/DEPS b/DEPS
index 2d64c6e..a30df7b 100644
--- a/DEPS
+++ b/DEPS
@@ -239,7 +239,7 @@
 deps = {
   'flutter/engine/src/flutter/third_party/dart': Var('dart_git') + '/sdk' + '@' + 'b0a4e7fc081df6e6eed91dbb804a6dcb9f318b57',
 
-  'flutter': Var('flutter_git') + '/mirrors/flutter' + '@' + '17ea9569da31b2d718fe3f9114d8b1b251b95f8b',
+  'flutter': Var('flutter_git') + '/mirrors/flutter' + '@' + '75cbf377fdfcee8235506cf231f428bc3e542b07',
 
   'flutter/engine/src/flutter/third_party/depot_tools':
   Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '580b4ff3f5cd0dcaa2eacda28cefe0f45320e8f7',

commits.json

diff --git a/commits.json b/commits.json
index 92b76df..0a3b513 100644
--- a/commits.json
+++ b/commits.json
@@ -1,4 +1,4 @@
 {
-  "flutter":"17ea9569da31b2d718fe3f9114d8b1b251b95f8b",
+  "flutter":"75cbf377fdfcee8235506cf231f428bc3e542b07",
   "flutter/engine/src/flutter/third_party/dart":"b0a4e7fc081df6e6eed91dbb804a6dcb9f318b57"
 }
\ No newline at end of file