example/ivy/android: use monospace & pre-wrap for WebView text formatting
example/ivy/android: use monospace & pre-wrap for WebView text formatting

Output from ivy is carefully formatted to work best in terminal.
Use of monospace & pre-wrap white space make table-format output look nicer.

Change-Id: If11fd57c8e685c01825fb1c2dd8b6d24fe860850
Reviewed-on: https://go-review.googlesource.com/c/mobile/+/356730
Run-TryBot: Hyang-Ah Hana Kim <d7e82c3c07f92613bcbf9a1e88f6b96c13caa3b0@gmail.com>
TryBot-Result: Go Bot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Hajime Hoshi <1c55649263e1aefbe86bfa40d3d8351033a4d83f@gmail.com>
Trust: Peter Weinberger <dd140fb9530d791057dd8833ea6768ff65fcde71@google.com>

golang/mobile,golang/mobile,golang/mobile,golang/mobile