Run node-svgo to crush all SVGs whilst retaining readibility

svgo --pretty \
     --disable=removeXMLProcInst \
     --disable=cleanupIDs \
     --disable=collapseGroups \
     -f …

Change-Id: I45757c9667e4a7413bcef7b23808f20a60e592ca
Provide RTL variants of eight icons

Per bug 63593. However, this does somewhat bloat our payload.

Change-Id: Id98d585dfcacf01941808c228800ee2bf2c559fb
Merge "Run node-svgo to crush all SVGs whilst retaining readibility"
Merge "Provide RTL variants of eight icons"