Don't omit frame pointers in profiling Android GN builds.
Don't omit frame pointers in profiling Android GN builds.

This CL makes sure that frame pointers (used for fast stack unwinding)
are not omitted when enable_profiling is true. There are two changes:

1. Don't add -fomit-frame-pointer flag (Android-specific change).

2. Add -fno-omit-frame-pointer flag even in debug builds. This is needed
   for Android where debug builds are optimized too (-Os).

BUG=602701

Review-Url: https://codereview.chromium.org/1965143003
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#393320}

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