🔧 Mark android_deps READMEs security critical for APK dependencies

Bug: 787005
Change-Id: I3ca8398b856a610a17f2d2c9a03901b58dbb5f65
Reviewed-on: https://chromium-review.googlesource.com/941445Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Nicolas Dossou-Gbété <dgn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#539864}

tools/android/roll/android_deps/buildSrc/src/main/groovy/BuildConfigGenerator.groovy

@@ -196,7 +196,7 @@ class BuildConfigGenerator extends DefaultTask {
         Version: ${dependency.version}
         License: ${licenseString}
         License File: ${dependency.supportsAndroid ? "LICENSE" : "NOT_SHIPPED"}
-        Security Critical: no
+        Security Critical: ${dependency.supportsAndroid ? "yes" : "no"}
 
         Description:
         ${dependency.description}