Increase timeout of webrtc_perf_tests on Android to 1h15m

It's called "shard timeout" but we're intentionally running only one shard.

This value matches the one in https://chromium.googlesource.com/chromium/tools/build/+/master/scripts/slave/recipe_modules/webrtc/builders.py

Bug: webrtc:10094, webrtc:9783
Change-Id: I0d7f04e200121a1b574a42fe8c6cfe30983cceda
Reviewed-on: https://webrtc-review.googlesource.com/c/114280
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25998}
diff --git a/BUILD.gn b/BUILD.gn
index a45bea0..c9249ff 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -603,7 +603,7 @@
     data = webrtc_perf_tests_resources
     if (is_android) {
       deps += [ "//testing/android/native_test:native_test_native_code" ]
-      shard_timeout = 2700
+      shard_timeout = 4500
     }
     if (is_ios) {
       deps += [ ":webrtc_perf_tests_bundle_data" ]