Add extraNinjaDeps to mixed builds depfile

This was accidentally removed in aosp/2094705. Among other possible
issues, this caused the "used environment variable" file to be omitted
from the depfile of soong_build during mixed builds, which would result
in soong_build not being subsequently retriggered during env var
changes.

Sendng this out as a quickfix, regression test to follow.

Bug: 233774464
Test: Manual `m nothing && USE_BAZEL_ANALYSIS=1 m nothing && m nothing`,
verifying that a rebuild was retriggered in each invocation.

Change-Id: I1d9dbd1bc4696df760ebb9be262bc165c161bb21

cmd/soong_build/main.go

@@ -144,6 +144,7 @@ func runMixedModeBuild(configuration android.Config, ctx *android.Context, extra
 	ctx.SetBeforePrepareBuildActionsHook(bazelHook)
 
 	ninjaDeps := bootstrap.RunBlueprint(cmdlineArgs, bootstrap.DoEverything, ctx.Context, configuration)
+	ninjaDeps = append(ninjaDeps, extraNinjaDeps...)
 
 	globListFiles := writeBuildGlobsNinjaFile(ctx, configuration.SoongOutDir(), configuration)
 	ninjaDeps = append(ninjaDeps, globListFiles...)