Add product partition file support

This is needed for Sunfish too.

TEST: build and flashed coral. Made phone call and text message.

BUG: 145289377
BUG: 152444305

Merged-In: I201ac6c73a3658b38ae3790d9a90c9805f656ad5
Merged-In: I2e86176285b888a923cb44278767af9f16710635

Change-Id: I201ac6c73a3658b38ae3790d9a90c9805f656ad5
(cherry picked from commit 38ff933a4ea9dc8b8b96ad91b33c7851e220c693)
1 file changed