android_webview: add a dep on crashpad_main

crashpad_main defines the native entry point for the JNI call used to
launch Crashpad from CrashpadMain.java. This dependency was mistakenly
removed in:
https://chromium-review.googlesource.com/c/chromium/src/+/1824018

Bug: 1008383
Change-Id: I20c27a14191611eba8155affb404370ca6523c3e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1827825
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Richard Coles <torne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700392}

android_webview/BUILD.gn

@@ -474,6 +474,7 @@ source_set("common") {
     # Called via JNI
     "//components/about_ui",
     "//components/autofill/core/common",
+    "//components/crash/android:crashpad_main",
     "//components/gwp_asan/buildflags",
     "//components/safe_browsing/android:safe_browsing_api_handler",
     "//components/services/heap_profiling/public/cpp",